2 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
4 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
5 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
9 #include <linux/types.h>
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/ioport.h>
13 #include <linux/pci.h>
14 #include <linux/hdreg.h>
15 #include <linux/ide.h>
16 #include <linux/delay.h>
17 #include <linux/init.h>
21 #define ATIIXP_IDE_PIO_TIMING 0x40
22 #define ATIIXP_IDE_MDMA_TIMING 0x44
23 #define ATIIXP_IDE_PIO_CONTROL 0x48
24 #define ATIIXP_IDE_PIO_MODE 0x4a
25 #define ATIIXP_IDE_UDMA_CONTROL 0x54
26 #define ATIIXP_IDE_UDMA_MODE 0x56
33 static atiixp_ide_timing pio_timing[] = {
41 static atiixp_ide_timing mdma_timing[] = {
47 static int save_mdma_mode[4];
50 * atiixp_ratemask - compute rate mask for ATIIXP IDE
51 * @drive: IDE drive to compute for
53 * Returns the available modes for the ATIIXP IDE controller.
56 static u8 atiixp_ratemask(ide_drive_t *drive)
60 if (!eighty_ninty_three(drive))
61 mode = min(mode, (u8)1);
66 * atiixp_dma_2_pio - return the PIO mode matching DMA
67 * @xfer_rate: transfer speed
69 * Returns the nearest equivalent PIO timing for the PIO or DMA
70 * mode requested by the controller.
73 static u8 atiixp_dma_2_pio(u8 xfer_rate) {
102 static int atiixp_ide_dma_host_on(ide_drive_t *drive)
104 struct pci_dev *dev = drive->hwif->pci_dev;
108 spin_lock_irqsave(&ide_lock, flags);
110 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
111 if (save_mdma_mode[drive->dn])
112 tmp16 &= ~(1 << drive->dn);
114 tmp16 |= (1 << drive->dn);
115 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
117 spin_unlock_irqrestore(&ide_lock, flags);
119 return __ide_dma_host_on(drive);
122 static int atiixp_ide_dma_host_off(ide_drive_t *drive)
124 struct pci_dev *dev = drive->hwif->pci_dev;
128 spin_lock_irqsave(&ide_lock, flags);
130 pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
131 tmp16 &= ~(1 << drive->dn);
132 pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
134 spin_unlock_irqrestore(&ide_lock, flags);
136 return __ide_dma_host_off(drive);
140 * atiixp_tune_drive - tune a drive attached to a ATIIXP
141 * @drive: drive to tune
142 * @pio: desired PIO mode
144 * Set the interface PIO mode.
147 static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
149 struct pci_dev *dev = drive->hwif->pci_dev;
151 int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
155 spin_lock_irqsave(&ide_lock, flags);
157 pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
158 pio_mode_data &= ~(0x07 << (drive->dn * 4));
159 pio_mode_data |= (pio << (drive->dn * 4));
160 pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
162 pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
163 pio_timing_data &= ~(0xff << timing_shift);
164 pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
165 (pio_timing[pio].command_width << (timing_shift + 4));
166 pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
168 spin_unlock_irqrestore(&ide_lock, flags);
172 * atiixp_tune_chipset - tune a ATIIXP interface
173 * @drive: IDE drive to tune
174 * @xferspeed: speed to configure
176 * Set a ATIIXP interface channel to the desired speeds. This involves
177 * requires the right timing data into the ATIIXP configuration space
178 * then setting the drive parameters appropriately
181 static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
183 struct pci_dev *dev = drive->hwif->pci_dev;
185 int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
190 speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);
192 spin_lock_irqsave(&ide_lock, flags);
194 save_mdma_mode[drive->dn] = 0;
195 if (speed >= XFER_UDMA_0) {
196 pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
197 tmp16 &= ~(0x07 << (drive->dn * 4));
198 tmp16 |= ((speed & 0x07) << (drive->dn * 4));
199 pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
201 if ((speed >= XFER_MW_DMA_0) && (speed <= XFER_MW_DMA_2)) {
202 save_mdma_mode[drive->dn] = speed;
203 pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
204 tmp32 &= ~(0xff << timing_shift);
205 tmp32 |= (mdma_timing[speed & 0x03].recover_width << timing_shift) |
206 (mdma_timing[speed & 0x03].command_width << (timing_shift + 4));
207 pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
211 spin_unlock_irqrestore(&ide_lock, flags);
213 if (speed >= XFER_SW_DMA_0)
214 pio = atiixp_dma_2_pio(speed);
216 pio = speed - XFER_PIO_0;
218 atiixp_tuneproc(drive, pio);
220 return ide_config_drive_speed(drive, speed);
224 * atiixp_config_drive_for_dma - configure drive for DMA
225 * @drive: IDE drive to configure
227 * Set up a ATIIXP interface channel for the best available speed.
228 * We prefer UDMA if it is available and then MWDMA. If DMA is
229 * not available we switch to PIO and return 0.
232 static int atiixp_config_drive_for_dma(ide_drive_t *drive)
234 u8 speed = ide_dma_speed(drive, atiixp_ratemask(drive));
236 /* If no DMA speed was available then disable DMA and use PIO. */
238 u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
239 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
242 (void) atiixp_speedproc(drive, speed);
243 return ide_dma_enable(drive);
247 * atiixp_dma_check - set up an IDE device
248 * @drive: IDE drive to configure
250 * Set up the ATIIXP interface for the best available speed on this
251 * interface, preferring DMA to PIO.
254 static int atiixp_dma_check(ide_drive_t *drive)
256 ide_hwif_t *hwif = HWIF(drive);
257 struct hd_driveid *id = drive->id;
260 drive->init_speed = 0;
262 if ((id->capability & 1) && drive->autodma) {
264 if (ide_use_dma(drive)) {
265 if (atiixp_config_drive_for_dma(drive))
266 return hwif->ide_dma_on(drive);
271 } else if ((id->capability & 8) || (id->field_valid & 2)) {
273 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
274 speed = atiixp_dma_2_pio(XFER_PIO_0 + tspeed) + XFER_PIO_0;
275 hwif->speedproc(drive, speed);
276 return hwif->ide_dma_off_quietly(drive);
278 /* IORDY not supported */
283 * init_hwif_atiixp - fill in the hwif for the ATIIXP
284 * @hwif: IDE interface
286 * Set up the ide_hwif_t for the ATIIXP interface according to the
287 * capabilities of the hardware.
290 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
293 hwif->irq = hwif->channel ? 15 : 14;
296 hwif->tuneproc = &atiixp_tuneproc;
297 hwif->speedproc = &atiixp_speedproc;
298 hwif->drives[0].autotune = 1;
299 hwif->drives[1].autotune = 1;
305 hwif->ultra_mask = 0x3f;
306 hwif->mwdma_mask = 0x06;
307 hwif->swdma_mask = 0x04;
309 /* FIXME: proper cable detection needed */
311 hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
312 hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
313 hwif->ide_dma_check = &atiixp_dma_check;
317 hwif->drives[1].autodma = hwif->autodma;
318 hwif->drives[0].autodma = hwif->autodma;
321 static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
324 .init_hwif = init_hwif_atiixp,
327 .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
328 .bootable = ON_BOARD,
333 * atiixp_init_one - called when a ATIIXP is found
334 * @dev: the atiixp device
335 * @id: the matching pci id
337 * Called when the PCI registration layer (or the IDE initialization)
338 * finds a device matching our IDE device tables.
341 static int __devinit atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
343 return ide_setup_pci_device(dev, &atiixp_pci_info[id->driver_data]);
346 static struct pci_device_id atiixp_pci_tbl[] = {
347 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP200_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
348 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
349 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
350 { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
353 MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
355 static struct pci_driver driver = {
356 .name = "ATIIXP_IDE",
357 .id_table = atiixp_pci_tbl,
358 .probe = atiixp_init_one,
361 static int atiixp_ide_init(void)
363 return ide_pci_register_driver(&driver);
366 module_init(atiixp_ide_init);
368 MODULE_AUTHOR("HUI YU");
369 MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
370 MODULE_LICENSE("GPL");