ide: add PIO masks
[deliverable/linux.git] / drivers / ide / pci / it8213.c
CommitLineData
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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
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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
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20/**
21 * it8213_dma_2_pio - return the PIO mode matching DMA
22 * @xfer_rate: transfer speed
23 *
24 * Returns the nearest equivalent PIO timing for the PIO or DMA
25 * mode requested by the controller.
26 */
27
28static u8 it8213_dma_2_pio (u8 xfer_rate) {
29 switch(xfer_rate) {
30 case XFER_UDMA_6:
31 case XFER_UDMA_5:
32 case XFER_UDMA_4:
33 case XFER_UDMA_3:
34 case XFER_UDMA_2:
35 case XFER_UDMA_1:
36 case XFER_UDMA_0:
37 case XFER_MW_DMA_2:
38 case XFER_PIO_4:
39 return 4;
40 case XFER_MW_DMA_1:
41 case XFER_PIO_3:
42 return 3;
43 case XFER_SW_DMA_2:
44 case XFER_PIO_2:
45 return 2;
46 case XFER_MW_DMA_0:
47 case XFER_SW_DMA_1:
48 case XFER_SW_DMA_0:
49 case XFER_PIO_1:
50 case XFER_PIO_0:
51 case XFER_PIO_SLOW:
52 default:
53 return 0;
54 }
55}
56
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57/*
58 * it8213_tuneproc - tune a drive
59 * @drive: drive to tune
67881826 60 * @pio: desired PIO mode
9c6712c0 61 *
67881826 62 * Set the interface PIO mode.
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63 */
64
67881826 65static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
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66{
67 ide_hwif_t *hwif = HWIF(drive);
68 struct pci_dev *dev = hwif->pci_dev;
67881826 69 int is_slave = drive->dn & 1;
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70 int master_port = 0x40;
71 int slave_port = 0x44;
72 unsigned long flags;
73 u16 master_data;
74 u8 slave_data;
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75 static DEFINE_SPINLOCK(tune_lock);
76 int control = 0;
9c6712c0 77
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78 static const u8 timings[][2]= {
79 { 0, 0 },
80 { 0, 0 },
81 { 1, 0 },
82 { 2, 1 },
83 { 2, 3 }, };
9c6712c0 84
2134758d 85 pio = ide_get_best_pio_mode(drive, pio, 4);
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86
87 spin_lock_irqsave(&tune_lock, flags);
88 pci_read_config_word(dev, master_port, &master_data);
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89
90 if (pio > 1)
91 control |= 1; /* Programmable timing on */
92 if (drive->media != ide_disk)
93 control |= 4; /* ATAPI */
94 if (pio > 2)
95 control |= 2; /* IORDY */
9c6712c0 96 if (is_slave) {
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97 master_data |= 0x4000;
98 master_data &= ~0x0070;
9c6712c0 99 if (pio > 1)
67881826 100 master_data = master_data | (control << 4);
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101 pci_read_config_byte(dev, slave_port, &slave_data);
102 slave_data = slave_data & 0xf0;
67881826 103 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
9c6712c0 104 } else {
67881826 105 master_data &= ~0x3307;
9c6712c0 106 if (pio > 1)
67881826 107 master_data = master_data | control;
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108 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
109 }
110 pci_write_config_word(dev, master_port, master_data);
111 if (is_slave)
112 pci_write_config_byte(dev, slave_port, slave_data);
113 spin_unlock_irqrestore(&tune_lock, flags);
114}
115
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116/**
117 * it8213_tune_chipset - set controller timings
118 * @drive: Drive to set up
119 * @xferspeed: speed we want to achieve
120 *
121 * Tune the ITE chipset for the desired mode. If we can't achieve
122 * the desired mode then tune for a lower one, but ultimately
123 * make the thing work.
124 */
125
67881826 126static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
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127{
128
129 ide_hwif_t *hwif = HWIF(drive);
130 struct pci_dev *dev = hwif->pci_dev;
131 u8 maslave = 0x40;
2d5eaa6d 132 u8 speed = ide_rate_filter(drive, xferspeed);
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133 int a_speed = 3 << (drive->dn * 4);
134 int u_flag = 1 << drive->dn;
135 int v_flag = 0x01 << drive->dn;
136 int w_flag = 0x10 << drive->dn;
137 int u_speed = 0;
138 u16 reg4042, reg4a;
139 u8 reg48, reg54, reg55;
140
141 pci_read_config_word(dev, maslave, &reg4042);
142 pci_read_config_byte(dev, 0x48, &reg48);
143 pci_read_config_word(dev, 0x4a, &reg4a);
144 pci_read_config_byte(dev, 0x54, &reg54);
145 pci_read_config_byte(dev, 0x55, &reg55);
146
147 switch(speed) {
148 case XFER_UDMA_6:
149 case XFER_UDMA_4:
67881826 150 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
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151 case XFER_UDMA_5:
152 case XFER_UDMA_3:
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153 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
154 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
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155 break;
156 case XFER_MW_DMA_2:
157 case XFER_MW_DMA_1:
67881826 158 case XFER_SW_DMA_2:
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159 break;
160 case XFER_PIO_4:
161 case XFER_PIO_3:
162 case XFER_PIO_2:
163 case XFER_PIO_1:
164 case XFER_PIO_0:
165 break;
166 default:
167 return -1;
168 }
169
67881826 170 if (speed >= XFER_UDMA_0) {
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171 if (!(reg48 & u_flag))
172 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
173 if (speed >= XFER_UDMA_5) {
174 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
175 } else {
176 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
177 }
178
179 if ((reg4a & a_speed) != u_speed)
180 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
67881826 181 if (speed > XFER_UDMA_2) {
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182 if (!(reg54 & v_flag))
183 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
184 } else
185 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
67881826 186 } else {
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187 if (reg48 & u_flag)
188 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
189 if (reg4a & a_speed)
190 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
191 if (reg54 & v_flag)
192 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
193 if (reg55 & w_flag)
194 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
67881826 195 }
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196 it8213_tuneproc(drive, it8213_dma_2_pio(speed));
197 return ide_config_drive_speed(drive, speed);
67881826 198}
9c6712c0 199
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200/**
201 * it8213_configure_drive_for_dma - set up for DMA transfers
202 * @drive: drive we are going to set up
203 *
204 * Set up the drive for DMA, tune the controller and drive as
205 * required. If the drive isn't suitable for DMA or we hit
206 * other problems then we will drop down to PIO and set up
207 * PIO appropriately
208 */
209
210static int it8213_config_drive_for_dma (ide_drive_t *drive)
211{
3608b5d7 212 u8 pio;
67881826 213
29e744d0 214 if (ide_tune_dma(drive))
3608b5d7 215 return 0;
9c6712c0 216
2134758d 217 pio = ide_get_best_pio_mode(drive, 255, 4);
3608b5d7 218 it8213_tune_chipset(drive, XFER_PIO_0 + pio);
9c6712c0 219
3608b5d7 220 return -1;
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221}
222
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223/**
224 * init_hwif_it8213 - set up hwif structs
225 * @hwif: interface to set up
226 *
227 * We do the basic set up of the interface structure. The IT8212
228 * requires several custom handlers so we override the default
229 * ide DMA handlers appropriately
230 */
231
232static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
233{
49521f97 234 u8 reg42h = 0;
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235
236 hwif->speedproc = &it8213_tune_chipset;
237 hwif->tuneproc = &it8213_tuneproc;
238
239 hwif->autodma = 0;
240
241 hwif->drives[0].autotune = 1;
242 hwif->drives[1].autotune = 1;
243
244 if (!hwif->dma_base)
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245 return;
246
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247 hwif->atapi_dma = 1;
248 hwif->ultra_mask = 0x7f;
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249 hwif->mwdma_mask = 0x06;
250 hwif->swdma_mask = 0x04;
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251
252 pci_read_config_byte(hwif->pci_dev, 0x42, &reg42h);
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253
254 hwif->ide_dma_check = &it8213_config_drive_for_dma;
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255
256 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
257 hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
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258
259 /*
260 * The BIOS often doesn't set up DMA on this controller
261 * so we always do it.
262 */
263 if (!noautodma)
264 hwif->autodma = 1;
265
266 hwif->drives[0].autodma = hwif->autodma;
267 hwif->drives[1].autodma = hwif->autodma;
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268}
269
270
271#define DECLARE_ITE_DEV(name_str) \
272 { \
273 .name = name_str, \
9c6712c0 274 .init_hwif = init_hwif_it8213, \
67881826 275 .autodma = AUTODMA, \
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276 .enablebits = {{0x41,0x80,0x80}}, \
277 .bootable = ON_BOARD, \
a5d8c5c8 278 .host_flags = IDE_HFLAG_SINGLE, \
4099d143 279 .pio_mask = ATA_PIO4, \
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280 }
281
282static ide_pci_device_t it8213_chipsets[] __devinitdata = {
283 /* 0 */ DECLARE_ITE_DEV("IT8213"),
284};
285
286
287/**
288 * it8213_init_one - pci layer discovery entry
289 * @dev: PCI device
290 * @id: ident table entry
291 *
292 * Called by the PCI code when it finds an ITE8213 controller. As
293 * this device follows the standard interfaces we can use the
294 * standard helper functions to do almost all the work for us.
295 */
296
297static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
298{
299 ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
300 return 0;
301}
302
303
304static struct pci_device_id it8213_pci_tbl[] = {
67881826 305 { PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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306 { 0, },
307};
308
309MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
310
311static struct pci_driver driver = {
312 .name = "ITE8213_IDE",
313 .id_table = it8213_pci_tbl,
314 .probe = it8213_init_one,
315};
316
317static int __init it8213_ide_init(void)
318{
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319 return ide_pci_register_driver(&driver);
320}
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321
322module_init(it8213_ide_init);
323
67881826 324MODULE_AUTHOR("Jack Lee, Alan Cox");
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325MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
326MODULE_LICENSE("GPL");
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