/* * pata_amd.c - AMD PATA for new ATA layer * (C) 2005-2006 Red Hat Inc * * Based on pata-sil680. Errata information is taken from data sheets * and the amd74xx.c driver by Vojtech Pavlik. Nvidia SATA devices are * claimed by sata-nv.c. * * TODO: * Variable system clock when/if it makes sense * Power management on ports * * * Documentation publicly available. */ #include #include #include #include #include #include #include #define DRV_NAME "pata_amd" #define DRV_VERSION "0.4.1" /** * timing_setup - shared timing computation and load * @ap: ATA port being set up * @adev: drive being configured * @offset: port offset * @speed: target speed * @clock: clock multiplier (number of times 33MHz for this part) * * Perform the actual timing set up for Nvidia or AMD PATA devices. * The actual devices vary so they all call into this helper function * providing the clock multipler and offset (because AMD and Nvidia put * the ports at different locations). */ static void timing_setup(struct ata_port *ap, struct ata_device *adev, int offset, int speed, int clock) { static const unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 }; struct pci_dev *pdev = to_pci_dev(ap->host->dev); struct ata_device *peer = ata_dev_pair(adev); int dn = ap->port_no * 2 + adev->devno; struct ata_timing at, apeer; int T, UT; const int amd_clock = 33333; /* KHz. */ u8 t; T = 1000000000 / amd_clock; UT = T; if (clock >= 2) UT = T / 2; if (ata_timing_compute(adev, speed, &at, T, UT) < 0) { dev_err(&pdev->dev, "unknown mode %d\n", speed); return; } if (peer) { /* This may be over conservative */ if (peer->dma_mode) { ata_timing_compute(peer, peer->dma_mode, &apeer, T, UT); ata_timing_merge(&apeer, &at, &at, ATA_TIMING_8BIT); } ata_timing_compute(peer, peer->pio_mode, &apeer, T, UT); ata_timing_merge(&apeer, &at, &at, ATA_TIMING_8BIT); } if (speed == XFER_UDMA_5 && amd_clock <= 33333) at.udma = 1; if (speed == XFER_UDMA_6 && amd_clock <= 33333) at.udma = 15; /* * Now do the setup work */ /* Configure the address set up timing */ pci_read_config_byte(pdev, offset + 0x0C, &t); t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(at.setup, 1, 4) - 1) << ((3 - dn) << 1)); pci_write_config_byte(pdev, offset + 0x0C , t); /* Configure the 8bit I/O timing */ pci_write_config_byte(pdev, offset + 0x0E + (1 - (dn >> 1)), ((clamp_val(at.act8b, 1, 16) - 1) << 4) | (clamp_val(at.rec8b, 1, 16) - 1)); /* Drive timing */ pci_write_config_byte(pdev, offset + 0x08 + (3 - dn), ((clamp_val(at.active, 1, 16) - 1) << 4) | (clamp_val(at.recover, 1, 16) - 1)); switch (clock) { case 1: t = at.udma ? (0xc0 | (clamp_val(at.udma, 2, 5) - 2)) : 0x03; break; case 2: t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 2, 10)]) : 0x03; break; case 3: t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 1, 10)]) : 0x03; break; case 4: t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 1, 15)]) : 0x03; break; default: return; } /* UDMA timing */ if (at.udma) pci_write_config_byte(pdev, offset + 0x10 + (3 - dn), t); } /** * amd_pre_reset - perform reset handling * @link: ATA link * @deadline: deadline jiffies for the operation * * Reset sequence checking enable bits to see which ports are * active. */ static int amd_pre_reset(struct ata_link *link, unsigned long deadline) { static const struct pci_bits amd_enable_bits[] = { { 0x40, 1, 0x02, 0x02 }, { 0x40, 1, 0x01, 0x01 } }; struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (!pci_test_config_bits(pdev, &amd_enable_bits[ap->port_no])) return -ENOENT; return ata_sff_prereset(link, deadline); } /** * amd_cable_detect - report cable type * @ap: port * * AMD controller/BIOS setups record the cable type in word 0x42 */ static int amd_cable_detect(struct ata_port *ap) { static const u32 bitmask[2] = {0x03, 0x0C}; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ata66; pci_read_config_byte(pdev, 0x42, &ata66); if (ata66 & bitmask[ap->port_no]) return ATA_CBL_PATA80; return ATA_CBL_PATA40; } /** * amd_fifo_setup - set the PIO FIFO for ATA/ATAPI * @ap: ATA interface * @adev: ATA device * * Set the PCI fifo for this device according to the devices present * on the bus at this point in time. We need to turn the post write buffer * off for ATAPI devices as we may need to issue a word sized write to the * device as the final I/O */ static void amd_fifo_setup(struct ata_port *ap) { struct ata_device *adev; struct pci_dev *pdev = to_pci_dev(ap->host->dev); static const u8 fifobit[2] = { 0xC0, 0x30}; u8 fifo = fifobit[ap->port_no]; u8 r; ata_for_each_dev(adev, &ap->link, ENABLED) { if (adev->class == ATA_DEV_ATAPI) fifo = 0; } if (pdev->device == PCI_DEVICE_ID_AMD_VIPER_7411) /* FIFO is broken */ fifo = 0; /* On the later chips the read prefetch bits become no-op bits */ pci_read_config_byte(pdev, 0x41, &r); r &= ~fifobit[ap->port_no]; r |= fifo; pci_write_config_byte(pdev, 0x41, r); } /** * amd33_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the AMD registers for PIO mode. */ static void amd33_set_piomode(struct ata_port *ap, struct ata_device *adev) { amd_fifo_setup(ap); timing_setup(ap, adev, 0x40, adev->pio_mode, 1); } static void amd66_set_piomode(struct ata_port *ap, struct ata_device *adev) { amd_fifo_setup(ap); timing_setup(ap, adev, 0x40, adev->pio_mode, 2); } static void amd100_set_piomode(struct ata_port *ap, struct ata_device *adev) { amd_fifo_setup(ap); timing_setup(ap, adev, 0x40, adev->pio_mode, 3); } static void amd133_set_piomode(struct ata_port *ap, struct ata_device *adev) { amd_fifo_setup(ap); timing_setup(ap, adev, 0x40, adev->pio_mode, 4); } /** * amd33_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the AMD and Nvidia * chipset. */ static void amd33_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x40, adev->dma_mode, 1); } static void amd66_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x40, adev->dma_mode, 2); } static void amd100_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x40, adev->dma_mode, 3); } static void amd133_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x40, adev->dma_mode, 4); } /* Both host-side and drive-side detection results are worthless on NV * PATAs. Ignore them and just follow what BIOS configured. Both the * current configuration in PCI config reg and ACPI GTM result are * cached during driver attach and are consulted to select transfer * mode. */ static unsigned long nv_mode_filter(struct ata_device *dev, unsigned long xfer_mask) { static const unsigned int udma_mask_map[] = { ATA_UDMA2, ATA_UDMA1, ATA_UDMA0, 0, ATA_UDMA3, ATA_UDMA4, ATA_UDMA5, ATA_UDMA6 }; struct ata_port *ap = dev->link->ap; char acpi_str[32] = ""; u32 saved_udma, udma; const struct ata_acpi_gtm *gtm; unsigned long bios_limit = 0, acpi_limit = 0, limit; /* find out what BIOS configured */ udma = saved_udma = (unsigned long)ap->host->private_data; if (ap->port_no == 0) udma >>= 16; if (dev->devno == 0) udma >>= 8; if ((udma & 0xc0) == 0xc0) bios_limit = ata_pack_xfermask(0, 0, udma_mask_map[udma & 0x7]); /* consult ACPI GTM too */ gtm = ata_acpi_init_gtm(ap); if (gtm) { acpi_limit = ata_acpi_gtm_xfermask(dev, gtm); snprintf(acpi_str, sizeof(acpi_str), " (%u:%u:0x%x)", gtm->drive[0].dma, gtm->drive[1].dma, gtm->flags); } /* be optimistic, EH can take care of things if something goes wrong */ limit = bios_limit | acpi_limit; /* If PIO or DMA isn't configured at all, don't limit. Let EH * handle it. */ if (!(limit & ATA_MASK_PIO)) limit |= ATA_MASK_PIO; if (!(limit & (ATA_MASK_MWDMA | ATA_MASK_UDMA))) limit |= ATA_MASK_MWDMA | ATA_MASK_UDMA; /* PIO4, MWDMA2, UDMA2 should always be supported regardless of cable detection result */ limit |= ata_pack_xfermask(ATA_PIO4, ATA_MWDMA2, ATA_UDMA2); ata_port_dbg(ap, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, " "BIOS=0x%lx (0x%x) ACPI=0x%lx%s\n", xfer_mask, limit, xfer_mask & limit, bios_limit, saved_udma, acpi_limit, acpi_str); return xfer_mask & limit; } /** * nv_probe_init - cable detection * @lin: ATA link * * Perform cable detection. The BIOS stores this in PCI config * space for us. */ static int nv_pre_reset(struct ata_link *link, unsigned long deadline) { static const struct pci_bits nv_enable_bits[] = { { 0x50, 1, 0x02, 0x02 }, { 0x50, 1, 0x01, 0x01 } }; struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (!pci_test_config_bits(pdev, &nv_enable_bits[ap->port_no])) return -ENOENT; return ata_sff_prereset(link, deadline); } /** * nv100_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the AMD registers for PIO mode. */ static void nv100_set_piomode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x50, adev->pio_mode, 3); } static void nv133_set_piomode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x50, adev->pio_mode, 4); } /** * nv100_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the AMD and Nvidia * chipset. */ static void nv100_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x50, adev->dma_mode, 3); } static void nv133_set_dmamode(struct ata_port *ap, struct ata_device *adev) { timing_setup(ap, adev, 0x50, adev->dma_mode, 4); } static void nv_host_stop(struct ata_host *host) { u32 udma = (unsigned long)host->private_data; /* restore PCI config register 0x60 */ pci_write_config_dword(to_pci_dev(host->dev), 0x60, udma); } static struct scsi_host_template amd_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static const struct ata_port_operations amd_base_port_ops = { .inherits = &ata_bmdma32_port_ops, .prereset = amd_pre_reset, }; static struct ata_port_operations amd33_port_ops = { .inherits = &amd_base_port_ops, .cable_detect = ata_cable_40wire, .set_piomode = amd33_set_piomode, .set_dmamode = amd33_set_dmamode, }; static struct ata_port_operations amd66_port_ops = { .inherits = &amd_base_port_ops, .cable_detect = ata_cable_unknown, .set_piomode = amd66_set_piomode, .set_dmamode = amd66_set_dmamode, }; static struct ata_port_ * arch/arm/mach-netx/generic.c * * Copyright (C) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix * * 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 */ #include <linux/device.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> #include <mach/hardware.h> #include <asm/mach/map.h> #include <asm/hardware/vic.h> #include <mach/netx-regs.h> #include <asm/mach/irq.h> static struct map_desc netx_io_desc[] __initdata = { { .virtual = NETX_IO_VIRT, .pfn = __phys_to_pfn(NETX_IO_PHYS), .length = NETX_IO_SIZE, .type = MT_DEVICE } }; void __init netx_map_io(void) { iotable_init(netx_io_desc, ARRAY_SIZE(netx_io_desc)); } static struct resource netx_rtc_resources[] = { [0] = { .start = 0x00101200, .end = 0x00101220, .flags = IORESOURCE_MEM, }, }; static struct platform_device netx_rtc_device = { .name = "netx-rtc", .id = 0, .num_resources = ARRAY_SIZE(netx_rtc_resources), .resource = netx_rtc_resources, }; static struct platform_device *devices[] __initdata = { &netx_rtc_device, }; #if 0 #define DEBUG_IRQ(fmt...) printk(fmt) #else #define DEBUG_IRQ(fmt...) while (0) {} #endif static void netx_hif_demux_handler(unsigned int irq_unused, struct irq_desc *desc) { unsigned int irq = NETX_IRQ_HIF_CHAINED(0); unsigned int stat; stat = ((readl(NETX_DPMAS_INT_EN) & readl(NETX_DPMAS_INT_STAT)) >> 24) & 0x1f; while (stat) { if (stat & 1) { DEBUG_IRQ("handling irq %d\n