2 * linux/drivers/ide/pci/cs5535.c
4 * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
7 * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
8 * - Reworked tuneproc, set_drive, misc mods to prep for mainline
9 * - Work was sponsored by CIS (M) Sdn Bhd.
10 * Ported to Kernel 2.6.11 on June 26, 2005 by
11 * Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
12 * Alexander Kiausch <alex.kiausch@t-online.de>
13 * Originally developed by AMD for 2.4/2.6
15 * Development of this chipset driver was funded
16 * by the nice folks at National Semiconductor/AMD.
18 * This program is free software; you can redistribute it and/or modify it
19 * under the terms of the GNU General Public License version 2 as published by
20 * the Free Software Foundation.
23 * CS5535 documentation available from AMD
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/ide.h>
30 #include "ide-timing.h"
32 #define MSR_ATAC_BASE 0x51300000
33 #define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0)
34 #define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01)
35 #define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02)
36 #define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03)
37 #define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04)
38 #define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05)
39 #define ATAC_IO_BAR (MSR_ATAC_BASE+0x08)
40 #define ATAC_RESET (MSR_ATAC_BASE+0x10)
41 #define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20)
42 #define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21)
43 #define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22)
44 #define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23)
45 #define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24)
46 #define ATAC_BM0_CMD_PRIM 0x00
47 #define ATAC_BM0_STS_PRIM 0x02
48 #define ATAC_BM0_PRD 0x04
49 #define CS5535_CABLE_DETECT 0x48
51 /* Format I PIO settings. We seperate out cmd and data for safer timings */
53 static unsigned int cs5535_pio_cmd_timings[5] =
54 { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
55 static unsigned int cs5535_pio_dta_timings[5] =
56 { 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
58 static unsigned int cs5535_mwdma_timings[3] =
59 { 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
61 static unsigned int cs5535_udma_timings[5] =
62 { 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
64 /* Macros to check if the register is the reset value - reset value is an
65 invalid timing and indicates the register has not been set previously */
67 #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
68 #define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
71 * cs5535_set_speed - Configure the chipset to the new speed
72 * @drive: Drive to set up
73 * @speed: desired speed
75 * cs5535_set_speed() configures the chipset to a new speed.
77 static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
81 int unit = drive->select.b.unit;
84 /* Set the PIO timings */
85 if ((speed & XFER_MODE) == XFER_PIO) {
90 pioa = speed - XFER_PIO_0;
91 piob = ide_get_best_pio_mode(&(drive->hwif->drives[!unit]),
93 cmd = pioa < piob ? pioa : piob;
95 /* Write the speed of the current drive */
96 reg = (cs5535_pio_cmd_timings[cmd] << 16) |
97 cs5535_pio_dta_timings[pioa];
98 wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
100 /* And if nessesary - change the speed of the other drive */
101 rdmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
103 if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
104 cs5535_pio_cmd_timings[cmd]) {
106 reg |= cs5535_pio_cmd_timings[cmd] << 16;
107 wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
110 /* Set bit 31 of the DMA register for PIO format 1 timings */
111 rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
112 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
113 reg | 0x80000000UL, 0);
115 rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
117 reg &= 0x80000000UL; /* Preserve the PIO format bit */
119 if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_7)
120 reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
121 else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
122 reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
126 wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
130 static u8 cs5535_ratemask(ide_drive_t *drive)
132 /* eighty93 will return 1 if it's 80core and capable of
133 exceeding udma2, 0 otherwise. we need ratemask to set
134 the max speed and if we can > udma2 then we return 2
135 which selects speed_max as udma4 which is the 5535's max
136 speed, and 1 selects udma2 which is the max for 40c */
137 if (!eighty_ninty_three(drive))
145 * cs5535_set_drive - Configure the drive to the new speed
146 * @drive: Drive to set up
147 * @speed: desired speed
149 * cs5535_set_drive() configures the drive and the chipset to a
150 * new speed. It also can be called by upper layers.
152 static int cs5535_set_drive(ide_drive_t *drive, u8 speed)
154 speed = ide_rate_filter(cs5535_ratemask(drive), speed);
155 ide_config_drive_speed(drive, speed);
156 cs5535_set_speed(drive, speed);
162 * cs5535_tuneproc - PIO setup
163 * @drive: drive to set up
164 * @pio: mode to use (255 for 'best possible')
166 * A callback from the upper layers for PIO-only tuning.
168 static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed)
170 u8 modes[] = { XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3,
173 /* cs5535 max pio is pio 4, best_pio will check the blacklist.
174 i think we don't need to rate_filter the incoming xferspeed
175 since we know we're only going to choose pio */
176 xferspeed = ide_get_best_pio_mode(drive, xferspeed, 4, NULL);
177 ide_config_drive_speed(drive, modes[xferspeed]);
178 cs5535_set_speed(drive, xferspeed);
181 static int cs5535_config_drive_for_dma(ide_drive_t *drive)
185 speed = ide_dma_speed(drive, cs5535_ratemask(drive));
187 /* If no DMA speed was available then let dma_check hit pio */
192 cs5535_set_drive(drive, speed);
193 return ide_dma_enable(drive);
196 static int cs5535_dma_check(ide_drive_t *drive)
200 drive->init_speed = 0;
202 if (ide_use_dma(drive) && cs5535_config_drive_for_dma(drive))
205 if (ide_use_fast_pio(drive)) {
206 speed = ide_get_best_pio_mode(drive, 255, 4, NULL);
207 cs5535_set_drive(drive, speed);
213 static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
217 /* if a 80 wire cable was detected */
218 pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
223 * init_hwif_cs5535 - Initialize one ide cannel
224 * @hwif: Channel descriptor
226 * This gets invoked by the IDE driver once for each channel. It
227 * performs channel-specific pre-initialization before drive probing.
230 static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
236 hwif->tuneproc = &cs5535_tuneproc;
237 hwif->speedproc = &cs5535_set_drive;
238 hwif->ide_dma_check = &cs5535_dma_check;
241 hwif->ultra_mask = 0x1F;
242 hwif->mwdma_mask = 0x07;
245 hwif->udma_four = cs5535_cable_detect(hwif->pci_dev);
250 /* just setting autotune and not worrying about bios timings */
251 for (i = 0; i < 2; i++) {
252 hwif->drives[i].autotune = 1;
253 hwif->drives[i].autodma = hwif->autodma;
257 static ide_pci_device_t cs5535_chipset __devinitdata = {
259 .init_hwif = init_hwif_cs5535,
262 .bootable = ON_BOARD,
265 static int __devinit cs5535_init_one(struct pci_dev *dev,
266 const struct pci_device_id *id)
268 return ide_setup_pci_device(dev, &cs5535_chipset);
271 static struct pci_device_id cs5535_pci_tbl[] =
273 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_IDE, PCI_ANY_ID,
274 PCI_ANY_ID, 0, 0, 0},
278 MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
280 static struct pci_driver driver = {
281 .name = "CS5535_IDE",
282 .id_table = cs5535_pci_tbl,
283 .probe = cs5535_init_one,
286 static int __init cs5535_ide_init(void)
288 return ide_pci_register_driver(&driver);
291 module_init(cs5535_ide_init);
293 MODULE_AUTHOR("AMD");
294 MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
295 MODULE_LICENSE("GPL");