/* * linux/drivers/ide/pci/cs5535.c * * Copyright (C) 2004-2005 Advanced Micro Devices, Inc. * Copyright (C) 2007 Bartlomiej Zolnierkiewicz * * History: * 09/20/2005 - Jaya Kumar * - 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 * Alexander Kiausch * 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 #include #include #include "ide-timing.h" #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 seperate 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; int unit = drive->select.b.unit; /* Set the PIO timings */ if ((speed & XFER_MODE) == XFER_PIO) { ide_drive_t *pair = ide_get_paired_drive(drive); u8 cmd, pioa; cmd = pioa = speed - XFER_PIO_0; if (pair->present) { 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 __devinit cs5535_cable_detect(struct pci_dev *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; } /**** * init_hwif_cs5535 - Initialize one ide cannel * @hwif: Channel descriptor * * This gets invoked by the IDE driver once for each channel. It * performs channel-specific pre-initialization before drive probing. * */ static void __devinit init_hwif_cs5535(ide_hwif_t *hwif) { hwif->set_pio_mode = &cs5535_set_pio_mode; hwif->set_dma_mode = &cs5535_set_dma_mode; if (hwif->dma_base == 0) return; hwif->cbl = cs5535_cable_detect(hwif->pci_dev); } static struct ide_port_info cs5535_chipset __devinitdata = { .name = "CS5535", .init_hwif = init_hwif_cs5535, .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE | IDE_HFLAG_BOOTABLE, .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_setup_pci_device(dev, &cs5535_chipset); } 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 driver = { .name = "CS5535_IDE", .id_table = cs5535_pci_tbl, .probe = cs5535_init_one, }; static int __init cs5535_ide_init(void) { return ide_pci_register_driver(&driver); } module_init(cs5535_ide_init); MODULE_AUTHOR("AMD"); MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE"); MODULE_LICENSE("GPL");