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9986ce65be
'struct pci_device_id' is not modified in these drivers. Constifying this structure moves some data to a read-only section, so increase overall security. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 4245 1454 4 5703 1647 drivers/ata/ata_generic.o After: ===== text data bss dec hex filename 4725 974 4 5703 1647 drivers/ata/ata_generic.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Niklas Cassel <cassel@kernel.org> Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru> Link: https://lore.kernel.org/r/8bddfee7f6f0f90eeb6da7156e30ab3bd553deb1.1731704917.git.christophe.jaillet@wanadoo.fr Signed-off-by: Niklas Cassel <cassel@kernel.org>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/*
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* pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
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*
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* This is basically an update to ata_generic.c to add Toshiba Piccolo support
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* then split out to keep ata_generic "clean".
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*
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* Copyright 2005 Red Hat Inc, all rights reserved.
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*
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* Elements from ide/pci/generic.c
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* Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
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* Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com>
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*
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* May be copied or modified under the terms of the GNU General Public License
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*
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* The timing data tables/programming info are courtesy of the NetBSD driver
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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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#define DRV_NAME "pata_piccolo"
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#define DRV_VERSION "0.0.1"
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static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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static const u16 pio[6] = { /* For reg 0x50 low word & E088 */
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0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
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};
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u16 conf;
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pci_read_config_word(pdev, 0x50, &conf);
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conf &= 0xE088;
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conf |= pio[adev->pio_mode - XFER_PIO_0];
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pci_write_config_word(pdev, 0x50, conf);
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}
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static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u32 conf;
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pci_read_config_dword(pdev, 0x5C, &conf);
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conf &= 0x78FFE088; /* Keep the other bits */
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if (adev->dma_mode >= XFER_UDMA_0) {
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int udma = adev->dma_mode - XFER_UDMA_0;
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conf |= 0x80000000;
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conf |= (udma + 2) << 28;
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conf |= (2 - udma) * 0x111; /* spread into three nibbles */
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} else {
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static const u32 mwdma[4] = {
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0x0655, 0x0200, 0x0200, 0x0100
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};
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conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
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}
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pci_write_config_dword(pdev, 0x5C, conf);
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}
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static const struct scsi_host_template tosh_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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static struct ata_port_operations tosh_port_ops = {
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.inherits = &ata_bmdma_port_ops,
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.cable_detect = ata_cable_unknown,
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.set_piomode = tosh_set_piomode,
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.set_dmamode = tosh_set_dmamode
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};
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/**
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* ata_tosh_init_one - attach generic IDE
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* @dev: PCI device found
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* @id: match entry
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*
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* Called each time a matching IDE interface is found. We check if the
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* interface is one we wish to claim and if so we perform any chip
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* specific hacks then let the ATA layer do the heavy lifting.
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*/
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static int ata_tosh_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_PIO5,
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.mwdma_mask = ATA_MWDMA2,
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.udma_mask = ATA_UDMA2,
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.port_ops = &tosh_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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/* Just one port for the moment */
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return ata_pci_bmdma_init_one(dev, ppi, &tosh_sht, NULL, 0);
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}
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static const struct pci_device_id ata_tosh[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), },
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{ 0, },
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};
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static struct pci_driver ata_tosh_pci_driver = {
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.name = DRV_NAME,
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.id_table = ata_tosh,
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.probe = ata_tosh_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(ata_tosh_pci_driver);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, ata_tosh);
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MODULE_VERSION(DRV_VERSION);
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