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203 lines
5.6 KiB
203 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* pata-cs5535.c - CS5535 PATA for new ATA layer |
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* (C) 2005-2006 Red Hat Inc |
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* Alan Cox <[email protected]> |
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* |
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* based upon cs5535.c from AMD <[email protected]> as cleaned up and |
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* made readable and Linux style by Wolfgang Zuleger <[email protected]> |
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* and Alexander Kiausch <[email protected]> |
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* |
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* Loosely based on the piix & svwks drivers. |
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* |
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* Documentation: |
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* Available from AMD web site. |
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* TODO |
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* Review errata to see if serializing is necessary |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/blkdev.h> |
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#include <linux/delay.h> |
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#include <scsi/scsi_host.h> |
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#include <linux/libata.h> |
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#include <asm/msr.h> |
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#define DRV_NAME "pata_cs5535" |
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#define DRV_VERSION "0.2.12" |
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/* |
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* The Geode (Aka Athlon GX now) uses an internal MSR based |
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* bus system for control. Demented but there you go. |
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*/ |
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#define MSR_ATAC_BASE 0x51300000 |
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#define ATAC_GLD_MSR_CAP (MSR_ATAC_BASE+0) |
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#define ATAC_GLD_MSR_CONFIG (MSR_ATAC_BASE+0x01) |
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#define ATAC_GLD_MSR_SMI (MSR_ATAC_BASE+0x02) |
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#define ATAC_GLD_MSR_ERROR (MSR_ATAC_BASE+0x03) |
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#define ATAC_GLD_MSR_PM (MSR_ATAC_BASE+0x04) |
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#define ATAC_GLD_MSR_DIAG (MSR_ATAC_BASE+0x05) |
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#define ATAC_IO_BAR (MSR_ATAC_BASE+0x08) |
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#define ATAC_RESET (MSR_ATAC_BASE+0x10) |
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#define ATAC_CH0D0_PIO (MSR_ATAC_BASE+0x20) |
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#define ATAC_CH0D0_DMA (MSR_ATAC_BASE+0x21) |
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#define ATAC_CH0D1_PIO (MSR_ATAC_BASE+0x22) |
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#define ATAC_CH0D1_DMA (MSR_ATAC_BASE+0x23) |
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#define ATAC_PCI_ABRTERR (MSR_ATAC_BASE+0x24) |
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#define ATAC_BM0_CMD_PRIM 0x00 |
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#define ATAC_BM0_STS_PRIM 0x02 |
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#define ATAC_BM0_PRD 0x04 |
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#define CS5535_CABLE_DETECT 0x48 |
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/** |
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* cs5535_cable_detect - detect cable type |
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* @ap: Port to detect on |
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* |
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* Perform cable detection for ATA66 capable cable. Return a libata |
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* cable type. |
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*/ |
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static int cs5535_cable_detect(struct ata_port *ap) |
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{ |
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u8 cable; |
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struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
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pci_read_config_byte(pdev, CS5535_CABLE_DETECT, &cable); |
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if (cable & 1) |
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return ATA_CBL_PATA80; |
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else |
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return ATA_CBL_PATA40; |
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} |
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/** |
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* cs5535_set_piomode - PIO setup |
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* @ap: ATA interface |
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* @adev: device on the interface |
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* |
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* Set our PIO requirements. The CS5535 is pretty clean about all this |
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*/ |
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static void cs5535_set_piomode(struct ata_port *ap, struct ata_device *adev) |
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{ |
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static const u16 pio_timings[5] = { |
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0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 |
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}; |
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static const u16 pio_cmd_timings[5] = { |
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0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 |
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}; |
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u32 reg, dummy; |
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struct ata_device *pair = ata_dev_pair(adev); |
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int mode = adev->pio_mode - XFER_PIO_0; |
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int cmdmode = mode; |
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/* Command timing has to be for the lowest of the pair of devices */ |
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if (pair) { |
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int pairmode = pair->pio_mode - XFER_PIO_0; |
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cmdmode = min(mode, pairmode); |
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/* Write the other drive timing register if it changed */ |
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if (cmdmode < pairmode) |
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wrmsr(ATAC_CH0D0_PIO + 2 * pair->devno, |
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pio_cmd_timings[cmdmode] << 16 | pio_timings[pairmode], 0); |
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} |
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/* Write the drive timing register */ |
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wrmsr(ATAC_CH0D0_PIO + 2 * adev->devno, |
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pio_cmd_timings[cmdmode] << 16 | pio_timings[mode], 0); |
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/* Set the PIO "format 1" bit in the DMA timing register */ |
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rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); |
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wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg | 0x80000000UL, 0); |
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} |
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/** |
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* cs5535_set_dmamode - DMA timing setup |
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* @ap: ATA interface |
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* @adev: Device being configured |
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* |
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*/ |
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static void cs5535_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
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{ |
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static const u32 udma_timings[5] = { |
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0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 |
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}; |
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static const u32 mwdma_timings[3] = { |
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0x7F0FFFF3, 0x7F035352, 0x7F024241 |
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}; |
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u32 reg, dummy; |
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int mode = adev->dma_mode; |
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rdmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, dummy); |
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reg &= 0x80000000UL; |
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if (mode >= XFER_UDMA_0) |
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reg |= udma_timings[mode - XFER_UDMA_0]; |
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else |
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reg |= mwdma_timings[mode - XFER_MW_DMA_0]; |
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wrmsr(ATAC_CH0D0_DMA + 2 * adev->devno, reg, 0); |
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} |
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static struct scsi_host_template cs5535_sht = { |
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ATA_BMDMA_SHT(DRV_NAME), |
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}; |
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static struct ata_port_operations cs5535_port_ops = { |
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.inherits = &ata_bmdma_port_ops, |
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.cable_detect = cs5535_cable_detect, |
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.set_piomode = cs5535_set_piomode, |
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.set_dmamode = cs5535_set_dmamode, |
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}; |
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/** |
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* cs5535_init_one - Initialise a CS5530 |
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* @dev: PCI device |
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* @id: Entry in match table |
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* |
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* Install a driver for the newly found CS5530 companion chip. Most of |
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* this is just housekeeping. We have to set the chip up correctly and |
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* turn off various bits of emulation magic. |
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*/ |
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static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
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{ |
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static const struct ata_port_info info = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, |
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.mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA4, |
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.port_ops = &cs5535_port_ops |
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}; |
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const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; |
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return ata_pci_bmdma_init_one(dev, ppi, &cs5535_sht, NULL, 0); |
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} |
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static const struct pci_device_id cs5535[] = { |
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{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), }, |
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{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), }, |
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{ }, |
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}; |
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static struct pci_driver cs5535_pci_driver = { |
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.name = DRV_NAME, |
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.id_table = cs5535, |
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.probe = cs5535_init_one, |
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.remove = ata_pci_remove_one, |
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#ifdef CONFIG_PM_SLEEP |
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.suspend = ata_pci_device_suspend, |
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.resume = ata_pci_device_resume, |
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#endif |
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}; |
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module_pci_driver(cs5535_pci_driver); |
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MODULE_AUTHOR("Alan Cox, Jens Altmann, Wolfgan Zuleger, Alexander Kiausch"); |
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MODULE_DESCRIPTION("low-level driver for the NS/AMD 5535"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DEVICE_TABLE(pci, cs5535); |
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MODULE_VERSION(DRV_VERSION);
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