cs5535.c 6.17 KB
Newer Older
Jaya Kumar's avatar
Jaya Kumar committed
1 2
/*
 * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
3
 * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
Jaya Kumar's avatar
Jaya Kumar committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
 *
 * History:
 * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
 * - Reworked tuneproc, set_drive, misc mods to prep for mainline
 * - Work was sponsored by CIS (M) Sdn Bhd.
 * Ported to Kernel 2.6.11 on June 26, 2005 by
 *   Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
 *   Alexander Kiausch <alex.kiausch@t-online.de>
 * Originally developed by AMD for 2.4/2.6
 *
 * Development of this chipset driver was funded
 * by the nice folks at National Semiconductor/AMD.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * Documentation:
 *  CS5535 documentation available from AMD
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/ide.h>

29 30
#define DRV_NAME "cs5535"

Jaya Kumar's avatar
Jaya Kumar committed
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
#define MSR_ATAC_BASE		0x51300000
#define ATAC_GLD_MSR_CAP	(MSR_ATAC_BASE+0)
#define ATAC_GLD_MSR_CONFIG	(MSR_ATAC_BASE+0x01)
#define ATAC_GLD_MSR_SMI	(MSR_ATAC_BASE+0x02)
#define ATAC_GLD_MSR_ERROR	(MSR_ATAC_BASE+0x03)
#define ATAC_GLD_MSR_PM		(MSR_ATAC_BASE+0x04)
#define ATAC_GLD_MSR_DIAG	(MSR_ATAC_BASE+0x05)
#define ATAC_IO_BAR		(MSR_ATAC_BASE+0x08)
#define ATAC_RESET		(MSR_ATAC_BASE+0x10)
#define ATAC_CH0D0_PIO		(MSR_ATAC_BASE+0x20)
#define ATAC_CH0D0_DMA		(MSR_ATAC_BASE+0x21)
#define ATAC_CH0D1_PIO		(MSR_ATAC_BASE+0x22)
#define ATAC_CH0D1_DMA		(MSR_ATAC_BASE+0x23)
#define ATAC_PCI_ABRTERR	(MSR_ATAC_BASE+0x24)
#define ATAC_BM0_CMD_PRIM	0x00
#define ATAC_BM0_STS_PRIM	0x02
#define ATAC_BM0_PRD		0x04
#define CS5535_CABLE_DETECT	0x48

50
/* Format I PIO settings. We separate out cmd and data for safer timings */
Jaya Kumar's avatar
Jaya Kumar committed
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

static unsigned int cs5535_pio_cmd_timings[5] =
{ 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
static unsigned int cs5535_pio_dta_timings[5] =
{ 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };

static unsigned int cs5535_mwdma_timings[3] =
{ 0x7F0FFFF3, 0x7F035352, 0x7f024241 };

static unsigned int cs5535_udma_timings[5] =
{ 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };

/* Macros to check if the register is the reset value -  reset value is an
   invalid timing and indicates the register has not been set previously */

#define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
#define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )

/****
 *	cs5535_set_speed         -     Configure the chipset to the new speed
 *	@drive: Drive to set up
 *	@speed: desired speed
 *
 *	cs5535_set_speed() configures the chipset to a new speed.
 */
76
static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
Jaya Kumar's avatar
Jaya Kumar committed
77 78
{
	u32 reg = 0, dummy;
79
	u8 unit = drive->dn & 1;
Jaya Kumar's avatar
Jaya Kumar committed
80 81

	/* Set the PIO timings */
82
	if (speed < XFER_SW_DMA_0) {
83
		ide_drive_t *pair = ide_get_pair_dev(drive);
84
		u8 cmd, pioa;
Jaya Kumar's avatar
Jaya Kumar committed
85

86 87
		cmd = pioa = speed - XFER_PIO_0;

88
		if (pair) {
89
			u8 piob = pair->pio_mode - XFER_PIO_0;
90 91 92 93

			if (piob < cmd)
				cmd = piob;
		}
Jaya Kumar's avatar
Jaya Kumar committed
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

		/* Write the speed of the current drive */
		reg = (cs5535_pio_cmd_timings[cmd] << 16) |
			cs5535_pio_dta_timings[pioa];
		wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);

		/* And if nessesary - change the speed of the other drive */
		rdmsr(unit ?  ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);

		if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
			cs5535_pio_cmd_timings[cmd]) {
			reg &= 0x0000FFFF;
			reg |= cs5535_pio_cmd_timings[cmd] << 16;
			wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
		}

		/* Set bit 31 of the DMA register for PIO format 1 timings */
		rdmsr(unit ?  ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
		wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
					reg | 0x80000000UL, 0);
	} else {
		rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);

		reg &= 0x80000000UL;  /* Preserve the PIO format bit */

119
		if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
Jaya Kumar's avatar
Jaya Kumar committed
120 121 122 123 124 125 126 127 128 129
			reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
		else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
			reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
		else
			return;

		wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
	}
}

130 131
/**
 *	cs5535_set_dma_mode	-	set host controller for DMA mode
132
 *	@hwif: port
133
 *	@drive: drive
Jaya Kumar's avatar
Jaya Kumar committed
134
 *
135
 *	Programs the chipset for DMA mode.
Jaya Kumar's avatar
Jaya Kumar committed
136
 */
137

138
static void cs5535_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
139
{
140
	cs5535_set_speed(drive, drive->dma_mode);
Jaya Kumar's avatar
Jaya Kumar committed
141 142
}

143
/**
144
 *	cs5535_set_pio_mode	-	set host controller for PIO mode
145
 *	@hwif: port
146
 *	@drive: drive
Jaya Kumar's avatar
Jaya Kumar committed
147 148 149
 *
 *	A callback from the upper layers for PIO-only tuning.
 */
150

151
static void cs5535_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Jaya Kumar's avatar
Jaya Kumar committed
152
{
153
	cs5535_set_speed(drive, drive->pio_mode);
Jaya Kumar's avatar
Jaya Kumar committed
154 155
}

156
static u8 cs5535_cable_detect(ide_hwif_t *hwif)
Jaya Kumar's avatar
Jaya Kumar committed
157
{
158
	struct pci_dev *dev = to_pci_dev(hwif->dev);
Jaya Kumar's avatar
Jaya Kumar committed
159 160 161 162
	u8 bit;

	/* if a 80 wire cable was detected */
	pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
163 164

	return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
Jaya Kumar's avatar
Jaya Kumar committed
165 166
}

167 168 169 170 171
static const struct ide_port_ops cs5535_port_ops = {
	.set_pio_mode		= cs5535_set_pio_mode,
	.set_dma_mode		= cs5535_set_dma_mode,
	.cable_detect		= cs5535_cable_detect,
};
Jaya Kumar's avatar
Jaya Kumar committed
172

173
static const struct ide_port_info cs5535_chipset = {
174
	.name		= DRV_NAME,
175
	.port_ops	= &cs5535_port_ops,
176
	.host_flags	= IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE,
177
	.pio_mask	= ATA_PIO4,
178 179
	.mwdma_mask	= ATA_MWDMA2,
	.udma_mask	= ATA_UDMA4,
Jaya Kumar's avatar
Jaya Kumar committed
180 181
};

182
static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
Jaya Kumar's avatar
Jaya Kumar committed
183
{
184
	return ide_pci_init_one(dev, &cs5535_chipset, NULL);
Jaya Kumar's avatar
Jaya Kumar committed
185 186
}

187 188
static const struct pci_device_id cs5535_pci_tbl[] = {
	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 },
189
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), },
Jaya Kumar's avatar
Jaya Kumar committed
190 191 192 193 194
	{ 0, },
};

MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);

195
static struct pci_driver cs5535_pci_driver = {
196 197 198 199 200 201
	.name		= "CS5535_IDE",
	.id_table	= cs5535_pci_tbl,
	.probe		= cs5535_init_one,
	.remove		= ide_pci_remove,
	.suspend	= ide_pci_suspend,
	.resume		= ide_pci_resume,
Jaya Kumar's avatar
Jaya Kumar committed
202 203 204 205
};

static int __init cs5535_ide_init(void)
{
206
	return ide_pci_register_driver(&cs5535_pci_driver);
Jaya Kumar's avatar
Jaya Kumar committed
207 208
}

209 210
static void __exit cs5535_ide_exit(void)
{
211
	pci_unregister_driver(&cs5535_pci_driver);
212 213
}

Jaya Kumar's avatar
Jaya Kumar committed
214
module_init(cs5535_ide_init);
215
module_exit(cs5535_ide_exit);
Jaya Kumar's avatar
Jaya Kumar committed
216 217 218 219

MODULE_AUTHOR("AMD");
MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
MODULE_LICENSE("GPL");