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_tuneproc(ide_drive_t *drive, u8 pio)
110 pio = ide_get_best_pio_mode(drive, pio, 4);
111 it8213_tune_pio(drive, pio);
112 ide_config_drive_speed(drive, XFER_PIO_0 + pio);
116 * it8213_tune_chipset - set controller timings
117 * @drive: Drive to set up
118 * @xferspeed: speed we want to achieve
120 * Tune the ITE chipset for the desired mode. If we can't achieve
121 * the desired mode then tune for a lower one, but ultimately
122 * make the thing work.
125 static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
128 ide_hwif_t *hwif = HWIF(drive);
129 struct pci_dev *dev = hwif->pci_dev;
131 u8 speed = ide_rate_filter(drive, xferspeed);
132 int a_speed = 3 << (drive->dn * 4);
133 int u_flag = 1 << drive->dn;
134 int v_flag = 0x01 << drive->dn;
135 int w_flag = 0x10 << drive->dn;
138 u8 reg48, reg54, reg55;
140 pci_read_config_word(dev, maslave, ®4042);
141 pci_read_config_byte(dev, 0x48, ®48);
142 pci_read_config_word(dev, 0x4a, ®4a);
143 pci_read_config_byte(dev, 0x54, ®54);
144 pci_read_config_byte(dev, 0x55, ®55);
149 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
152 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
153 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
169 if (speed >= XFER_UDMA_0) {
170 if (!(reg48 & u_flag))
171 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
172 if (speed >= XFER_UDMA_5) {
173 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
175 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
178 if ((reg4a & a_speed) != u_speed)
179 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
180 if (speed > XFER_UDMA_2) {
181 if (!(reg54 & v_flag))
182 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
184 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
187 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
189 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
191 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
193 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
196 if (speed > XFER_PIO_4)
197 it8213_tune_pio(drive, it8213_dma_2_pio(speed));
199 it8213_tune_pio(drive, speed - XFER_PIO_0);
201 return ide_config_drive_speed(drive, speed);
205 * it8213_configure_drive_for_dma - set up for DMA transfers
206 * @drive: drive we are going to set up
208 * Set up the drive for DMA, tune the controller and drive as
209 * required. If the drive isn't suitable for DMA or we hit
210 * other problems then we will drop down to PIO and set up
214 static int it8213_config_drive_for_dma (ide_drive_t *drive)
216 if (ide_tune_dma(drive))
219 it8213_tuneproc(drive, 255);
225 * init_hwif_it8213 - set up hwif structs
226 * @hwif: interface to set up
228 * We do the basic set up of the interface structure. The IT8212
229 * requires several custom handlers so we override the default
230 * ide DMA handlers appropriately
233 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
237 hwif->speedproc = &it8213_tune_chipset;
238 hwif->tuneproc = &it8213_tuneproc;
242 hwif->drives[0].autotune = 1;
243 hwif->drives[1].autotune = 1;
249 hwif->ultra_mask = 0x7f;
250 hwif->mwdma_mask = 0x06;
251 hwif->swdma_mask = 0x04;
253 pci_read_config_byte(hwif->pci_dev, 0x42, ®42h);
255 hwif->ide_dma_check = &it8213_config_drive_for_dma;
257 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
258 hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
261 * The BIOS often doesn't set up DMA on this controller
262 * so we always do it.
267 hwif->drives[0].autodma = hwif->autodma;
268 hwif->drives[1].autodma = hwif->autodma;
272 #define DECLARE_ITE_DEV(name_str) \
275 .init_hwif = init_hwif_it8213, \
276 .autodma = AUTODMA, \
277 .enablebits = {{0x41,0x80,0x80}}, \
278 .bootable = ON_BOARD, \
279 .host_flags = IDE_HFLAG_SINGLE, \
280 .pio_mask = ATA_PIO4, \
283 static ide_pci_device_t it8213_chipsets[] __devinitdata = {
284 /* 0 */ DECLARE_ITE_DEV("IT8213"),
289 * it8213_init_one - pci layer discovery entry
291 * @id: ident table entry
293 * Called by the PCI code when it finds an ITE8213 controller. As
294 * this device follows the standard interfaces we can use the
295 * standard helper functions to do almost all the work for us.
298 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
300 ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
305 static struct pci_device_id it8213_pci_tbl[] = {
306 { PCI_VENDOR_ID_ITE, 0x8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
310 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
312 static struct pci_driver driver = {
313 .name = "ITE8213_IDE",
314 .id_table = it8213_pci_tbl,
315 .probe = it8213_init_one,
318 static int __init it8213_ide_init(void)
320 return ide_pci_register_driver(&driver);
323 module_init(it8213_ide_init);
325 MODULE_AUTHOR("Jack Lee, Alan Cox");
326 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
327 MODULE_LICENSE("GPL");