4 * Copyright (C) 2006 Jack Lee
5 * Copyright (C) 2006 Alan Cox
6 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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>
21 * it8213_dma_2_pio - return the PIO mode matching DMA
22 * @xfer_rate: transfer speed
24 * Returns the nearest equivalent PIO timing for the PIO or DMA
25 * mode requested by the controller.
28 static u8 it8213_dma_2_pio (u8 xfer_rate) {
58 * it8213_tuneproc - tune a drive
59 * @drive: drive to tune
60 * @pio: desired PIO mode
62 * Set the interface PIO mode.
65 static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
67 ide_hwif_t *hwif = HWIF(drive);
68 struct pci_dev *dev = hwif->pci_dev;
69 int is_slave = drive->dn & 1;
70 int master_port = 0x40;
71 int slave_port = 0x44;
75 static DEFINE_SPINLOCK(tune_lock);
78 static const u8 timings[][2]= {
85 pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
87 spin_lock_irqsave(&tune_lock, flags);
88 pci_read_config_word(dev, master_port, &master_data);
91 control |= 1; /* Programmable timing on */
92 if (drive->media != ide_disk)
93 control |= 4; /* ATAPI */
95 control |= 2; /* IORDY */
97 master_data |= 0x4000;
98 master_data &= ~0x0070;
100 master_data = master_data | (control << 4);
101 pci_read_config_byte(dev, slave_port, &slave_data);
102 slave_data = slave_data & 0xf0;
103 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
105 master_data &= ~0x3307;
107 master_data = master_data | control;
108 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
110 pci_write_config_word(dev, master_port, master_data);
112 pci_write_config_byte(dev, slave_port, slave_data);
113 spin_unlock_irqrestore(&tune_lock, flags);
117 * it8213_tune_chipset - set controller timings
118 * @drive: Drive to set up
119 * @xferspeed: speed we want to achieve
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.
126 static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
129 ide_hwif_t *hwif = HWIF(drive);
130 struct pci_dev *dev = hwif->pci_dev;
132 u8 speed = ide_rate_filter(drive, xferspeed);
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;
139 u8 reg48, reg54, reg55;
141 pci_read_config_word(dev, maslave, ®4042);
142 pci_read_config_byte(dev, 0x48, ®48);
143 pci_read_config_word(dev, 0x4a, ®4a);
144 pci_read_config_byte(dev, 0x54, ®54);
145 pci_read_config_byte(dev, 0x55, ®55);
150 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
153 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
154 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
170 if (speed >= XFER_UDMA_0) {
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);
176 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
179 if ((reg4a & a_speed) != u_speed)
180 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
181 if (speed > XFER_UDMA_2) {
182 if (!(reg54 & v_flag))
183 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
185 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
188 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
190 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
192 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
194 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
196 it8213_tuneproc(drive, it8213_dma_2_pio(speed));
197 return ide_config_drive_speed(drive, speed);
201 * config_chipset_for_dma - configure for DMA
202 * @drive: drive to configure
204 * Called by the IDE layer when it wants the timings set up.
207 static int config_chipset_for_dma (ide_drive_t *drive)
209 u8 speed = ide_max_dma_mode(drive);
214 it8213_tune_chipset(drive, speed);
216 return ide_dma_enable(drive);
220 * it8213_configure_drive_for_dma - set up for DMA transfers
221 * @drive: drive we are going to set up
223 * Set up the drive for DMA, tune the controller and drive as
224 * required. If the drive isn't suitable for DMA or we hit
225 * other problems then we will drop down to PIO and set up
229 static int it8213_config_drive_for_dma (ide_drive_t *drive)
233 if (ide_use_dma(drive) && config_chipset_for_dma(drive))
236 pio = ide_get_best_pio_mode(drive, 255, 4, NULL);
237 it8213_tune_chipset(drive, XFER_PIO_0 + pio);
243 * init_hwif_it8213 - set up hwif structs
244 * @hwif: interface to set up
246 * We do the basic set up of the interface structure. The IT8212
247 * requires several custom handlers so we override the default
248 * ide DMA handlers appropriately
251 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
253 u8 reg42h = 0, ata66 = 0;
255 hwif->speedproc = &it8213_tune_chipset;
256 hwif->tuneproc = &it8213_tuneproc;
260 hwif->drives[0].autotune = 1;
261 hwif->drives[1].autotune = 1;
267 hwif->ultra_mask = 0x7f;
268 hwif->mwdma_mask = 0x06;
269 hwif->swdma_mask = 0x04;
271 pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
272 ata66 = (reg42h & 0x02) ? 0 : 1;
274 hwif->ide_dma_check = &it8213_config_drive_for_dma;
275 if (!(hwif->udma_four))
276 hwif->udma_four = ata66;
279 * The BIOS often doesn't set up DMA on this controller
280 * so we always do it.
285 hwif->drives[0].autodma = hwif->autodma;
286 hwif->drives[1].autodma = hwif->autodma;
290 #define DECLARE_ITE_DEV(name_str) \
293 .init_hwif = init_hwif_it8213, \
295 .autodma = AUTODMA, \
296 .enablebits = {{0x41,0x80,0x80}}, \
297 .bootable = ON_BOARD, \
300 static ide_pci_device_t it8213_chipsets[] __devinitdata = {
301 /* 0 */ DECLARE_ITE_DEV("IT8213"),
306 * it8213_init_one - pci layer discovery entry
308 * @id: ident table entry
310 * Called by the PCI code when it finds an ITE8213 controller. As
311 * this device follows the standard interfaces we can use the
312 * standard helper functions to do almost all the work for us.
315 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
317 ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
322 static struct pci_device_id it8213_pci_tbl[] = {
323 { PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
327 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
329 static struct pci_driver driver = {
330 .name = "ITE8213_IDE",
331 .id_table = it8213_pci_tbl,
332 .probe = it8213_init_one,
335 static int __init it8213_ide_init(void)
337 return ide_pci_register_driver(&driver);
340 module_init(it8213_ide_init);
342 MODULE_AUTHOR("Jack Lee, Alan Cox");
343 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
344 MODULE_LICENSE("GPL");