diff options
Diffstat (limited to 'drivers/ide/cs5535.c')
| -rw-r--r-- | drivers/ide/cs5535.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/ide/cs5535.c b/drivers/ide/cs5535.c new file mode 100644 index 0000000..983d957 --- /dev/null +++ b/drivers/ide/cs5535.c @@ -0,0 +1,219 @@ +/* + * Copyright (C) 2004-2005 Advanced Micro Devices, Inc. + * Copyright (C) 2007 Bartlomiej Zolnierkiewicz + * + * 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> + +#define DRV_NAME "cs5535" + +#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 + +/* Format I PIO settings. We separate out cmd and data for safer timings */ + +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. + */ +static void cs5535_set_speed(ide_drive_t *drive, const u8 speed) +{ + u32 reg = 0, dummy; + u8 unit = drive->dn & 1; + + /* Set the PIO timings */ + if (speed < XFER_SW_DMA_0) { + ide_drive_t *pair = ide_get_pair_dev(drive); + u8 cmd, pioa; + + cmd = pioa = speed - XFER_PIO_0; + + if (pair) { + u8 piob = ide_get_best_pio_mode(pair, 255, 4); + + if (piob < cmd) + cmd = piob; + } + + /* 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 */ + + if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4) + 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); + } +} + +/** + * cs5535_set_dma_mode - set host controller for DMA mode + * @drive: drive + * @speed: DMA mode + * + * Programs the chipset for DMA mode. + */ + +static void cs5535_set_dma_mode(ide_drive_t *drive, const u8 speed) +{ + cs5535_set_speed(drive, speed); +} + +/** + * cs5535_set_pio_mode - set host controller for PIO mode + * @drive: drive + * @pio: PIO mode number + * + * A callback from the upper layers for PIO-only tuning. + */ + +static void cs5535_set_pio_mode(ide_drive_t *drive, const u8 pio) +{ + cs5535_set_speed(drive, XFER_PIO_0 + pio); +} + +static u8 cs5535_cable_detect(ide_hwif_t *hwif) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 bit; + + /* if a 80 wire cable was detected */ + pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit); + + return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40; +} + +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, +}; + +static const struct ide_port_info cs5535_chipset __devinitdata = { + .name = DRV_NAME, + .port_ops = &cs5535_port_ops, + .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA4, +}; + +static int __devinit cs5535_init_one(struct pci_dev *dev, + const struct pci_device_id *id) +{ + return ide_pci_init_one(dev, &cs5535_chipset, NULL); +} + +static const struct pci_device_id cs5535_pci_tbl[] = { + { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 }, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl); + +static struct pci_driver cs5535_pci_driver = { + .name = "CS5535_IDE", + .id_table = cs5535_pci_tbl, + .probe = cs5535_init_one, + .remove = ide_pci_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init cs5535_ide_init(void) +{ + return ide_pci_register_driver(&cs5535_pci_driver); +} + +static void __exit cs5535_ide_exit(void) +{ + pci_unregister_driver(&cs5535_pci_driver); +} + +module_init(cs5535_ide_init); +module_exit(cs5535_ide_exit); + +MODULE_AUTHOR("AMD"); +MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE"); +MODULE_LICENSE("GPL"); |
