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 DMA
25 * mode requested by the controller.
28 static u8 it8213_dma_2_pio (u8 xfer_rate) {
52 * it8213_tune_pio - tune a drive
53 * @drive: drive to tune
54 * @pio: desired PIO mode
56 * Set the interface PIO mode.
59 static void it8213_tune_pio(ide_drive_t *drive, const u8 pio)
61 ide_hwif_t *hwif = HWIF(drive);
62 struct pci_dev *dev = hwif->pci_dev;
63 int is_slave = drive->dn & 1;
64 int master_port = 0x40;
65 int slave_port = 0x44;
69 static DEFINE_SPINLOCK(tune_lock);
72 static const u8 timings[][2]= {
79 spin_lock_irqsave(&tune_lock, flags);
80 pci_read_config_word(dev, master_port, &master_data);
83 control |= 1; /* Programmable timing on */
84 if (drive->media != ide_disk)
85 control |= 4; /* ATAPI */
87 control |= 2; /* IORDY */
89 master_data |= 0x4000;
90 master_data &= ~0x0070;
92 master_data = master_data | (control << 4);
93 pci_read_config_byte(dev, slave_port, &slave_data);
94 slave_data = slave_data & 0xf0;
95 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
97 master_data &= ~0x3307;
99 master_data = master_data | control;
100 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
102 pci_write_config_word(dev, master_port, master_data);
104 pci_write_config_byte(dev, slave_port, slave_data);
105 spin_unlock_irqrestore(&tune_lock, flags);
108 static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
110 it8213_tune_pio(drive, pio);
111 ide_config_drive_speed(drive, XFER_PIO_0 + pio);
115 * it8213_tune_chipset - set controller timings
116 * @drive: Drive to set up
117 * @speed: speed we want to achieve
119 * Tune the ITE chipset for the desired mode.
122 static int it8213_tune_chipset(ide_drive_t *drive, const u8 speed)
124 ide_hwif_t *hwif = HWIF(drive);
125 struct pci_dev *dev = hwif->pci_dev;
127 int a_speed = 3 << (drive->dn * 4);
128 int u_flag = 1 << drive->dn;
129 int v_flag = 0x01 << drive->dn;
130 int w_flag = 0x10 << drive->dn;
133 u8 reg48, reg54, reg55;
135 pci_read_config_word(dev, maslave, ®4042);
136 pci_read_config_byte(dev, 0x48, ®48);
137 pci_read_config_word(dev, 0x4a, ®4a);
138 pci_read_config_byte(dev, 0x54, ®54);
139 pci_read_config_byte(dev, 0x55, ®55);
144 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
147 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
148 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
158 if (speed >= XFER_UDMA_0) {
159 if (!(reg48 & u_flag))
160 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
161 if (speed >= XFER_UDMA_5) {
162 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
164 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
167 if ((reg4a & a_speed) != u_speed)
168 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
169 if (speed > XFER_UDMA_2) {
170 if (!(reg54 & v_flag))
171 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
173 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
176 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
178 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
180 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
182 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
185 it8213_tune_pio(drive, it8213_dma_2_pio(speed));
187 return ide_config_drive_speed(drive, speed);
191 * it8213_configure_drive_for_dma - set up for DMA transfers
192 * @drive: drive we are going to set up
194 * Set up the drive for DMA, tune the controller and drive as
195 * required. If the drive isn't suitable for DMA or we hit
196 * other problems then we will drop down to PIO and set up
200 static int it8213_config_drive_for_dma (ide_drive_t *drive)
202 if (ide_tune_dma(drive))
205 ide_set_max_pio(drive);
211 * init_hwif_it8213 - set up hwif structs
212 * @hwif: interface to set up
214 * We do the basic set up of the interface structure. The IT8212
215 * requires several custom handlers so we override the default
216 * ide DMA handlers appropriately
219 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
223 hwif->speedproc = &it8213_tune_chipset;
224 hwif->set_pio_mode = &it8213_set_pio_mode;
228 hwif->drives[0].autotune = 1;
229 hwif->drives[1].autotune = 1;
235 hwif->ultra_mask = 0x7f;
236 hwif->mwdma_mask = 0x06;
237 hwif->swdma_mask = 0x04;
239 pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
241 hwif->ide_dma_check = &it8213_config_drive_for_dma;
243 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
244 hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
247 * The BIOS often doesn't set up DMA on this controller
248 * so we always do it.
253 hwif->drives[0].autodma = hwif->autodma;
254 hwif->drives[1].autodma = hwif->autodma;
258 #define DECLARE_ITE_DEV(name_str) \
261 .init_hwif = init_hwif_it8213, \
262 .autodma = AUTODMA, \
263 .enablebits = {{0x41,0x80,0x80}}, \
264 .bootable = ON_BOARD, \
265 .host_flags = IDE_HFLAG_SINGLE, \
266 .pio_mask = ATA_PIO4, \
269 static ide_pci_device_t it8213_chipsets[] __devinitdata = {
270 /* 0 */ DECLARE_ITE_DEV("IT8213"),
275 * it8213_init_one - pci layer discovery entry
277 * @id: ident table entry
279 * Called by the PCI code when it finds an ITE8213 controller. As
280 * this device follows the standard interfaces we can use the
281 * standard helper functions to do almost all the work for us.
284 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
286 ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
291 static struct pci_device_id it8213_pci_tbl[] = {
292 { PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
296 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
298 static struct pci_driver driver = {
299 .name = "ITE8213_IDE",
300 .id_table = it8213_pci_tbl,
301 .probe = it8213_init_one,
304 static int __init it8213_ide_init(void)
306 return ide_pci_register_driver(&driver);
309 module_init(it8213_ide_init);
311 MODULE_AUTHOR("Jack Lee, Alan Cox");
312 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
313 MODULE_LICENSE("GPL");