Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
[linux-2.6] / drivers / ide / pci / it8213.c
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/delay.h>
14 #include <linux/hdreg.h>
15 #include <linux/ide.h>
16 #include <linux/init.h>
17
18 #include <asm/io.h>
19
20 /**
21  *      it8213_set_pio_mode     -       set host controller for PIO mode
22  *      @drive: drive
23  *      @pio: PIO mode number
24  *
25  *      Set the interface PIO mode.
26  */
27
28 static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
29 {
30         ide_hwif_t *hwif        = HWIF(drive);
31         struct pci_dev *dev     = hwif->pci_dev;
32         int is_slave            = drive->dn & 1;
33         int master_port         = 0x40;
34         int slave_port          = 0x44;
35         unsigned long flags;
36         u16 master_data;
37         u8 slave_data;
38         static DEFINE_SPINLOCK(tune_lock);
39         int control = 0;
40
41         static const u8 timings[][2]= {
42                                         { 0, 0 },
43                                         { 0, 0 },
44                                         { 1, 0 },
45                                         { 2, 1 },
46                                         { 2, 3 }, };
47
48         spin_lock_irqsave(&tune_lock, flags);
49         pci_read_config_word(dev, master_port, &master_data);
50
51         if (pio > 1)
52                 control |= 1;   /* Programmable timing on */
53         if (drive->media != ide_disk)
54                 control |= 4;   /* ATAPI */
55         if (pio > 2)
56                 control |= 2;   /* IORDY */
57         if (is_slave) {
58                 master_data |=  0x4000;
59                 master_data &= ~0x0070;
60                 if (pio > 1)
61                         master_data = master_data | (control << 4);
62                 pci_read_config_byte(dev, slave_port, &slave_data);
63                 slave_data = slave_data & 0xf0;
64                 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
65         } else {
66                 master_data &= ~0x3307;
67                 if (pio > 1)
68                         master_data = master_data | control;
69                 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
70         }
71         pci_write_config_word(dev, master_port, master_data);
72         if (is_slave)
73                 pci_write_config_byte(dev, slave_port, slave_data);
74         spin_unlock_irqrestore(&tune_lock, flags);
75 }
76
77 /**
78  *      it8213_set_dma_mode     -       set host controller for DMA mode
79  *      @drive: drive
80  *      @speed: DMA mode
81  *
82  *      Tune the ITE chipset for the DMA mode.
83  */
84
85 static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
86 {
87         ide_hwif_t *hwif        = HWIF(drive);
88         struct pci_dev *dev     = hwif->pci_dev;
89         u8 maslave              = 0x40;
90         int a_speed             = 3 << (drive->dn * 4);
91         int u_flag              = 1 << drive->dn;
92         int v_flag              = 0x01 << drive->dn;
93         int w_flag              = 0x10 << drive->dn;
94         int u_speed             = 0;
95         u16                     reg4042, reg4a;
96         u8                      reg48, reg54, reg55;
97
98         pci_read_config_word(dev, maslave, &reg4042);
99         pci_read_config_byte(dev, 0x48, &reg48);
100         pci_read_config_word(dev, 0x4a, &reg4a);
101         pci_read_config_byte(dev, 0x54, &reg54);
102         pci_read_config_byte(dev, 0x55, &reg55);
103
104         switch(speed) {
105                 case XFER_UDMA_6:
106                 case XFER_UDMA_4:
107                 case XFER_UDMA_2:       u_speed = 2 << (drive->dn * 4); break;
108                 case XFER_UDMA_5:
109                 case XFER_UDMA_3:
110                 case XFER_UDMA_1:       u_speed = 1 << (drive->dn * 4); break;
111                 case XFER_UDMA_0:       u_speed = 0 << (drive->dn * 4); break;
112                         break;
113                 case XFER_MW_DMA_2:
114                 case XFER_MW_DMA_1:
115                 case XFER_SW_DMA_2:
116                         break;
117                 default:
118                         return;
119         }
120
121         if (speed >= XFER_UDMA_0) {
122                 if (!(reg48 & u_flag))
123                         pci_write_config_byte(dev, 0x48, reg48 | u_flag);
124                 if (speed >= XFER_UDMA_5) {
125                         pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
126                 } else {
127                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
128                 }
129
130                 if ((reg4a & a_speed) != u_speed)
131                         pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
132                 if (speed > XFER_UDMA_2) {
133                         if (!(reg54 & v_flag))
134                                 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
135                 } else
136                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
137         } else {
138                 const u8 mwdma_to_pio[] = { 0, 3, 4 };
139                 u8 pio;
140
141                 if (reg48 & u_flag)
142                         pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
143                 if (reg4a & a_speed)
144                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
145                 if (reg54 & v_flag)
146                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
147                 if (reg55 & w_flag)
148                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
149
150                 if (speed >= XFER_MW_DMA_0)
151                         pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
152                 else
153                         pio = 2; /* only SWDMA2 is allowed */
154
155                 it8213_set_pio_mode(drive, pio);
156         }
157 }
158
159 /**
160  *      init_hwif_it8213        -       set up hwif structs
161  *      @hwif: interface to set up
162  *
163  *      We do the basic set up of the interface structure.
164  */
165
166 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
167 {
168         u8 reg42h = 0;
169
170         hwif->set_dma_mode = &it8213_set_dma_mode;
171         hwif->set_pio_mode = &it8213_set_pio_mode;
172
173         hwif->drives[0].autotune = 1;
174         hwif->drives[1].autotune = 1;
175
176         if (!hwif->dma_base)
177                 return;
178
179         hwif->atapi_dma = 1;
180         hwif->ultra_mask = 0x7f;
181         hwif->mwdma_mask = 0x06;
182         hwif->swdma_mask = 0x04;
183
184         pci_read_config_byte(hwif->pci_dev, 0x42, &reg42h);
185
186         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
187                 hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
188 }
189
190
191 #define DECLARE_ITE_DEV(name_str)                       \
192         {                                               \
193                 .name           = name_str,             \
194                 .init_hwif      = init_hwif_it8213,     \
195                 .autodma        = AUTODMA,              \
196                 .enablebits     = {{0x41,0x80,0x80}}, \
197                 .bootable       = ON_BOARD,             \
198                 .host_flags     = IDE_HFLAG_SINGLE,     \
199                 .pio_mask       = ATA_PIO4,             \
200         }
201
202 static ide_pci_device_t it8213_chipsets[] __devinitdata = {
203         /* 0 */ DECLARE_ITE_DEV("IT8213"),
204 };
205
206
207 /**
208  *      it8213_init_one -       pci layer discovery entry
209  *      @dev: PCI device
210  *      @id: ident table entry
211  *
212  *      Called by the PCI code when it finds an ITE8213 controller. As
213  *      this device follows the standard interfaces we can use the
214  *      standard helper functions to do almost all the work for us.
215  */
216
217 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
218 {
219         ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
220         return 0;
221 }
222
223 static const struct pci_device_id it8213_pci_tbl[] = {
224         { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
225         { 0, },
226 };
227
228 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
229
230 static struct pci_driver driver = {
231         .name           = "ITE8213_IDE",
232         .id_table       = it8213_pci_tbl,
233         .probe          = it8213_init_one,
234 };
235
236 static int __init it8213_ide_init(void)
237 {
238         return ide_pci_register_driver(&driver);
239 }
240
241 module_init(it8213_ide_init);
242
243 MODULE_AUTHOR("Jack Lee, Alan Cox");
244 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
245 MODULE_LICENSE("GPL");