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_set_pio_mode - set host controller for PIO mode
23 * @pio: PIO mode number
25 * Set the interface PIO mode.
28 static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
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;
38 static DEFINE_SPINLOCK(tune_lock);
41 static const u8 timings[][2]= {
48 spin_lock_irqsave(&tune_lock, flags);
49 pci_read_config_word(dev, master_port, &master_data);
52 control |= 1; /* Programmable timing on */
53 if (drive->media != ide_disk)
54 control |= 4; /* ATAPI */
56 control |= 2; /* IORDY */
58 master_data |= 0x4000;
59 master_data &= ~0x0070;
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];
66 master_data &= ~0x3307;
68 master_data = master_data | control;
69 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
71 pci_write_config_word(dev, master_port, master_data);
73 pci_write_config_byte(dev, slave_port, slave_data);
74 spin_unlock_irqrestore(&tune_lock, flags);
78 * it8213_set_dma_mode - set host controller for DMA mode
82 * Tune the ITE chipset for the DMA mode.
85 static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
87 ide_hwif_t *hwif = HWIF(drive);
88 struct pci_dev *dev = hwif->pci_dev;
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;
96 u8 reg48, reg54, reg55;
98 pci_read_config_word(dev, maslave, ®4042);
99 pci_read_config_byte(dev, 0x48, ®48);
100 pci_read_config_word(dev, 0x4a, ®4a);
101 pci_read_config_byte(dev, 0x54, ®54);
102 pci_read_config_byte(dev, 0x55, ®55);
107 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
110 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
111 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
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);
127 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
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);
136 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
138 const u8 mwdma_to_pio[] = { 0, 3, 4 };
142 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
144 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
146 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
148 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
150 if (speed >= XFER_MW_DMA_0)
151 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
153 pio = 2; /* only SWDMA2 is allowed */
155 it8213_set_pio_mode(drive, pio);
160 * init_hwif_it8213 - set up hwif structs
161 * @hwif: interface to set up
163 * We do the basic set up of the interface structure.
166 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
170 hwif->set_dma_mode = &it8213_set_dma_mode;
171 hwif->set_pio_mode = &it8213_set_pio_mode;
175 hwif->drives[0].autotune = 1;
176 hwif->drives[1].autotune = 1;
182 hwif->ultra_mask = 0x7f;
183 hwif->mwdma_mask = 0x06;
184 hwif->swdma_mask = 0x04;
186 pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
188 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
189 hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
192 * The BIOS often doesn't set up DMA on this controller
193 * so we always do it.
198 hwif->drives[0].autodma = hwif->autodma;
199 hwif->drives[1].autodma = hwif->autodma;
203 #define DECLARE_ITE_DEV(name_str) \
206 .init_hwif = init_hwif_it8213, \
207 .autodma = AUTODMA, \
208 .enablebits = {{0x41,0x80,0x80}}, \
209 .bootable = ON_BOARD, \
210 .host_flags = IDE_HFLAG_SINGLE, \
211 .pio_mask = ATA_PIO4, \
214 static ide_pci_device_t it8213_chipsets[] __devinitdata = {
215 /* 0 */ DECLARE_ITE_DEV("IT8213"),
220 * it8213_init_one - pci layer discovery entry
222 * @id: ident table entry
224 * Called by the PCI code when it finds an ITE8213 controller. As
225 * this device follows the standard interfaces we can use the
226 * standard helper functions to do almost all the work for us.
229 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
231 ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
235 static const struct pci_device_id it8213_pci_tbl[] = {
236 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
240 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
242 static struct pci_driver driver = {
243 .name = "ITE8213_IDE",
244 .id_table = it8213_pci_tbl,
245 .probe = it8213_init_one,
248 static int __init it8213_ide_init(void)
250 return ide_pci_register_driver(&driver);
253 module_init(it8213_ide_init);
255 MODULE_AUTHOR("Jack Lee, Alan Cox");
256 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
257 MODULE_LICENSE("GPL");