/* * pata-cs5535.c - CS5535 PATA for new ATA layer * (C) 2005-2006 Red Hat Inc * Alan Cox <alan@lxorguk.ukuu.org.uk> * * based upon cs5535.c from AMD <Jens.Altmann@amd.com> as cleaned up and * made readable and Linux style by Wolfgang Zuleger <wolfgang.zuleger@gmx.de * and Alexander Kiausch <alex.kiausch@t-online.de> * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Loosely based on the piix & svwks drivers. * * Documentation: * Available from AMD web site. * TODO * Review errata to see if serializing is necessary */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <asm/msr.h> #define DRV_NAME "cs5535" #define DRV_VERSION "0.2.12" /* * The Geode (Aka Athlon GX now) uses an internal MSR based * bus system for control. Demented but there you go. */ #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 #define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL)==0x00009172 ) /** * cs5535_cable_detect - detect cable type * @ap: Port to detect on * * Perform cable detection for ATA66 capable cable. Return a libata * cable type. */ static int cs5535_cable_detect(struct ata_port *ap) { u8 cable; struct pci_dev *pdev = to_pci_dev(ap->host->dev); pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable); if (cable & 1) return ATA_CBL_PATA80; else return ATA_CBL_PATA40; } /** * cs5535_set_piomode - PIO setup * @ap: ATA interface * @adev: device on the interface * * Set our PIO requirements. The CS5535 is pretty clean about all this */ static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev) { static const u16 pio_timings[5] = { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 }; static const u16 pio_cmd_timings[5] = { 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 }; u32 reg, dummy; struct ata_device *pair = ata_dev_pair(adev); int mode = adev->pio_mode - XFER_PIO_0; int cmdmode = mode; /* Command timing has to be for the lowest of the pair of devices */ if (pair) { int pairmode = pair->pio_mode - XFER_PIO_0; cmdmode = min(mode, pairmode); /* Write the other drive timing register if it changed */ if (cmdmode < pairmode) wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno, pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0); } /* Write the drive timing register */ wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno, pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0); /* Set the PIO "format 1" bit in the DMA timing register */ rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0); } /** * cs5535_set_dmamode - DMA timing setup * @ap: ATA interface * @adev: Device being configured * */ static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev) { static const u32 udma_timings[5] = { 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 }; static const u32 mwdma_timings[3] = { 0x7F0FFFF3, 0x7F035352, 0x7F024241 }; u32 reg, dummy; int mode = adev->dma_mode; rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); reg &= 0x80000000UL; if (mode >= XFER_UDMA_0) reg |= udma_timings[mode - XFER_UDMA_0]; else reg |= mwdma_timings[mode - XFER_MW_DMA_0]; wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0); } static struct scsi_host_template cs5535_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations cs5535_port_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = cs5535_cable_detect, .set_piomode = cs5535_set_piomode, .set_dmamode = cs5535_set_dmamode, }; /** * cs5535_init_one - Initialise a CS5530 * @dev: PCI device * @id: Entry in match table * * Install a driver for the newly found CS5530 companion chip. Most of * this is just housekeeping. We have to set the chip up correctly and * turn off various bits of emulation magic. */ static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id) { static const struct ata_port_info info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = ATA_UDMA4, .port_ops = &cs5535_port_ops }; const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; u32 timings, dummy; /* Check the BIOS set the initial timing clock. If not set the timings for PIO0 */ rdmsr(ATAC_CH0D0_PIO, timings, dummy); if (CS5535_BAD_PIO(timings)) wrmsr(ATAC_CH0D0_PIO, 0xF7F4F7F4UL, 0); rdmsr(ATAC_CH0D1_PIO, timings, dummy); if (CS5535_BAD_PIO(timings)) wrmsr(ATAC_CH0D1_PIO, 0xF7F4F7F4UL, 0); return ata_pci_sff_init_one(dev, ppi, &cs5535_sht, NULL); } static const struct pci_device_id cs5535[] = { { PCI_VDEVICE(NS, 0x002D), }, { }, }; static struct pci_driver cs5535_pci_driver = { .name = DRV_NAME, .id_table = cs5535, .probe = cs5535_init_one, .remove = ata_pci_remove_one, #ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; static int __init cs5535_init(void) { return pci_register_driver(&cs5535_pci_driver); } static void __exit cs5535_exit(void) { pci_unregister_driver(&cs5535_pci_driver); } MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch"); MODULE_DESCRIPTION("low-level driver for the NS/AMD 5530"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, cs5535); MODULE_VERSION(DRV_VERSION); module_init(cs5535_init); module_exit(cs5535_exit);