X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fide%2Fpci%2Fjmicron.c;fp=drivers%2Fide%2Fpci%2Fjmicron.c;h=d4e631df96f59a593792fb06f5b9f49f3f763929;hb=76828883507a47dae78837ab5dec5a5b4513c667;hp=0000000000000000000000000000000000000000;hpb=64ba3f394c830ec48a1c31b53dcae312c56f1604;p=linux-2.6.git diff --git a/drivers/ide/pci/jmicron.c b/drivers/ide/pci/jmicron.c new file mode 100644 index 000000000..d4e631df9 --- /dev/null +++ b/drivers/ide/pci/jmicron.c @@ -0,0 +1,290 @@ + +/* + * Copyright (C) 2006 Red Hat + * + * May be copied or modified under the terms of the GNU General Public License + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +typedef enum { + PORT_PATA0 = 0, + PORT_PATA1 = 1, + PORT_SATA = 2, +} port_type; + +/** + * jmicron_ratemask - Compute available modes + * @drive: IDE drive + * + * Compute the available speeds for the devices on the interface. This + * is all modes to ATA133 clipped by drive cable setup. + */ + +static u8 jmicron_ratemask(ide_drive_t *drive) +{ + u8 mode = 4; + if (!eighty_ninty_three(drive)) + mode = min(mode, (u8)1); + return mode; +} + +/** + * ata66_jmicron - Cable check + * @hwif: IDE port + * + * Return 1 if the cable is 80pin + */ + +static int __devinit ata66_jmicron(ide_hwif_t *hwif) +{ + struct pci_dev *pdev = hwif->pci_dev; + + u32 control; + u32 control5; + + int port = hwif->channel; + port_type port_map[2]; + + pci_read_config_dword(pdev, 0x40, &control); + + /* There are two basic mappings. One has the two SATA ports merged + as master/slave and the secondary as PATA, the other has only the + SATA port mapped */ + if (control & (1 << 23)) { + port_map[0] = PORT_SATA; + port_map[1] = PORT_PATA0; + } else { + port_map[0] = PORT_SATA; + port_map[1] = PORT_SATA; + } + + /* The 365/366 may have this bit set to map the second PATA port + as the internal primary channel */ + pci_read_config_dword(pdev, 0x80, &control5); + if (control5 & (1<<24)) + port_map[0] = PORT_PATA1; + + /* The two ports may then be logically swapped by the firmware */ + if (control & (1 << 22)) + port = port ^ 1; + + /* + * Now we know which physical port we are talking about we can + * actually do our cable checking etc. Thankfully we don't need + * to do the plumbing for other cases. + */ + switch (port_map[port]) + { + case PORT_PATA0: + if (control & (1 << 3)) /* 40/80 pin primary */ + return 0; + return 1; + case PORT_PATA1: + if (control5 & (1 << 19)) /* 40/80 pin secondary */ + return 0; + return 1; + case PORT_SATA: + break; + } + return 1; /* Avoid bogus "control reaches end of non-void function" */ +} + +static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted) +{ + return; +} + +/** + * config_jmicron_chipset_for_pio - set drive timings + * @drive: drive to tune + * @speed we want + * + */ + +static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed) +{ + u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL); + if (set_speed) + (void) ide_config_drive_speed(drive, speed); +} + +/** + * jmicron_tune_chipset - set controller timings + * @drive: Drive to set up + * @xferspeed: speed we want to achieve + * + * As the JMicron snoops for timings all we actually need to do is + * make sure we don't set an invalid mode. We do need to honour + * the cable detect here. + */ + +static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed) +{ + + u8 speed = ide_rate_filter(jmicron_ratemask(drive), xferspeed); + + return ide_config_drive_speed(drive, speed); +} + +/** + * config_chipset_for_dma - configure for DMA + * @drive: drive to configure + * + * As the JMicron snoops for timings all we actually need to do is + * make sure we don't set an invalid mode. + */ + +static int config_chipset_for_dma (ide_drive_t *drive) +{ + u8 speed = ide_dma_speed(drive, jmicron_ratemask(drive)); + + config_jmicron_chipset_for_pio(drive, !speed); + jmicron_tune_chipset(drive, speed); + return ide_dma_enable(drive); +} + +/** + * jmicron_configure_drive_for_dma - set up for DMA transfers + * @drive: drive we are going to set up + * + * As the JMicron snoops for timings all we actually need to do is + * make sure we don't set an invalid mode. + */ + +static int jmicron_config_drive_for_dma (ide_drive_t *drive) +{ + ide_hwif_t *hwif = drive->hwif; + + if (ide_use_dma(drive)) { + if (config_chipset_for_dma(drive)) + return hwif->ide_dma_on(drive); + } + config_jmicron_chipset_for_pio(drive, 1); + return hwif->ide_dma_off_quietly(drive); +} + +/** + * init_hwif_jmicron - set up hwif structs + * @hwif: interface to set up + * + * Minimal set up is required for the Jmicron hardware. + */ + +static void __devinit init_hwif_jmicron(ide_hwif_t *hwif) +{ + hwif->speedproc = &jmicron_tune_chipset; + hwif->tuneproc = &jmicron_tuneproc; + + hwif->drives[0].autotune = 1; + hwif->drives[1].autotune = 1; + + if (!hwif->dma_base) + goto fallback; + + hwif->atapi_dma = 1; + hwif->ultra_mask = 0x7f; + hwif->mwdma_mask = 0x07; + + hwif->ide_dma_check = &jmicron_config_drive_for_dma; + if (!(hwif->udma_four)) + hwif->udma_four = ata66_jmicron(hwif); + + hwif->autodma = 1; + hwif->drives[0].autodma = hwif->autodma; + hwif->drives[1].autodma = hwif->autodma; + return; +fallback: + hwif->autodma = 0; + return; +} + +#define DECLARE_JMB_DEV(name_str) \ + { \ + .name = name_str, \ + .init_hwif = init_hwif_jmicron, \ + .channels = 2, \ + .autodma = AUTODMA, \ + .bootable = ON_BOARD, \ + .enablebits = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \ + } + +static ide_pci_device_t jmicron_chipsets[] __devinitdata = { + /* 0 */ DECLARE_JMB_DEV("JMB361"), + /* 1 */ DECLARE_JMB_DEV("JMB363"), + /* 2 */ DECLARE_JMB_DEV("JMB365"), + /* 3 */ DECLARE_JMB_DEV("JMB366"), + /* 4 */ DECLARE_JMB_DEV("JMB368"), +}; + +/** + * jmicron_init_one - pci layer discovery entry + * @dev: PCI device + * @id: ident table entry + * + * Called by the PCI code when it finds a Jmicron controller. + * We then use the IDE PCI generic helper to do most of the work. + */ + +static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + printk(KERN_ERR "jmicron_init_one: device = %04X, driver_data = %lu\n", + id->device, id->driver_data); + ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]); + return 0; +} + +/* If libata is configured, jmicron PCI quirk will configure it such + * that the SATA ports are in AHCI function while the PATA ports are + * in a separate IDE function. In such cases, match device class and + * attach only to IDE. If libata isn't configured, keep the old + * behavior for backward compatibility. + */ +#if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE) +#define JMB_CLASS PCI_CLASS_STORAGE_IDE << 8 +#define JMB_CLASS_MASK 0xffff00 +#else +#define JMB_CLASS 0 +#define JMB_CLASS_MASK 0 +#endif + +static struct pci_device_id jmicron_pci_tbl[] = { + { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361, + PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 0}, + { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363, + PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 1}, + { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365, + PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 2}, + { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366, + PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 3}, + { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368, + PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 4}, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); + +static struct pci_driver driver = { + .name = "JMicron IDE", + .id_table = jmicron_pci_tbl, + .probe = jmicron_init_one, +}; + +static int __init jmicron_ide_init(void) +{ + return ide_pci_register_driver(&driver); +} + +module_init(jmicron_ide_init); + +MODULE_AUTHOR("Alan Cox"); +MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes"); +MODULE_LICENSE("GPL");