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/hdreg.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
18 * it8213_set_pio_mode - set host controller for PIO mode
20 * @pio: PIO mode number
22 * Set the interface PIO mode.
25 static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
27 ide_hwif_t *hwif = HWIF(drive);
28 struct pci_dev *dev = to_pci_dev(hwif->dev);
29 int is_slave = drive->dn & 1;
30 int master_port = 0x40;
31 int slave_port = 0x44;
35 static DEFINE_SPINLOCK(tune_lock);
38 static const u8 timings[][2] = {
45 spin_lock_irqsave(&tune_lock, flags);
46 pci_read_config_word(dev, master_port, &master_data);
49 control |= 1; /* Programmable timing on */
50 if (drive->media != ide_disk)
51 control |= 4; /* ATAPI */
53 control |= 2; /* IORDY */
55 master_data |= 0x4000;
56 master_data &= ~0x0070;
58 master_data = master_data | (control << 4);
59 pci_read_config_byte(dev, slave_port, &slave_data);
60 slave_data = slave_data & 0xf0;
61 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
63 master_data &= ~0x3307;
65 master_data = master_data | control;
66 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
68 pci_write_config_word(dev, master_port, master_data);
70 pci_write_config_byte(dev, slave_port, slave_data);
71 spin_unlock_irqrestore(&tune_lock, flags);
75 * it8213_set_dma_mode - set host controller for DMA mode
79 * Tune the ITE chipset for the DMA mode.
82 static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
84 ide_hwif_t *hwif = HWIF(drive);
85 struct pci_dev *dev = to_pci_dev(hwif->dev);
87 int a_speed = 3 << (drive->dn * 4);
88 int u_flag = 1 << drive->dn;
89 int v_flag = 0x01 << drive->dn;
90 int w_flag = 0x10 << drive->dn;
93 u8 reg48, reg54, reg55;
95 pci_read_config_word(dev, maslave, ®4042);
96 pci_read_config_byte(dev, 0x48, ®48);
97 pci_read_config_word(dev, 0x4a, ®4a);
98 pci_read_config_byte(dev, 0x54, ®54);
99 pci_read_config_byte(dev, 0x55, ®55);
101 if (speed >= XFER_UDMA_0) {
102 u8 udma = speed - XFER_UDMA_0;
104 u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
106 if (!(reg48 & u_flag))
107 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
108 if (speed >= XFER_UDMA_5)
109 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
111 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
113 if ((reg4a & a_speed) != u_speed)
114 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
115 if (speed > XFER_UDMA_2) {
116 if (!(reg54 & v_flag))
117 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
119 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
121 const u8 mwdma_to_pio[] = { 0, 3, 4 };
125 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
127 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
129 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
131 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
133 if (speed >= XFER_MW_DMA_0)
134 pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
136 pio = 2; /* only SWDMA2 is allowed */
138 it8213_set_pio_mode(drive, pio);
142 static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
144 struct pci_dev *dev = to_pci_dev(hwif->dev);
147 pci_read_config_byte(dev, 0x42, ®42h);
149 return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
152 static const struct ide_port_ops it8213_port_ops = {
153 .set_pio_mode = it8213_set_pio_mode,
154 .set_dma_mode = it8213_set_dma_mode,
155 .cable_detect = it8213_cable_detect,
158 #define DECLARE_ITE_DEV(name_str) \
161 .enablebits = { {0x41, 0x80, 0x80} }, \
162 .port_ops = &it8213_port_ops, \
163 .host_flags = IDE_HFLAG_SINGLE, \
164 .pio_mask = ATA_PIO4, \
165 .swdma_mask = ATA_SWDMA2_ONLY, \
166 .mwdma_mask = ATA_MWDMA12_ONLY, \
167 .udma_mask = ATA_UDMA6, \
170 static const struct ide_port_info it8213_chipsets[] __devinitdata = {
171 /* 0 */ DECLARE_ITE_DEV("IT8213"),
176 * it8213_init_one - pci layer discovery entry
178 * @id: ident table entry
180 * Called by the PCI code when it finds an ITE8213 controller. As
181 * this device follows the standard interfaces we can use the
182 * standard helper functions to do almost all the work for us.
185 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
187 return ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
190 static const struct pci_device_id it8213_pci_tbl[] = {
191 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
195 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
197 static struct pci_driver driver = {
198 .name = "ITE8213_IDE",
199 .id_table = it8213_pci_tbl,
200 .probe = it8213_init_one,
203 static int __init it8213_ide_init(void)
205 return ide_pci_register_driver(&driver);
208 module_init(it8213_ide_init);
210 MODULE_AUTHOR("Jack Lee, Alan Cox");
211 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
212 MODULE_LICENSE("GPL");