/* * BRIEF MODULE DESCRIPTION * AMD Alchemy Au1xxx IDE interface routines over the Static Bus * * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) any later * version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * 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., * 675 Mass Ave, Cambridge, MA 02139, USA. * * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE * Interface and Linux Device Driver" Application Note. */ #include <linux/types.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/init.h> #include <linux/ide.h> #include <linux/scatterlist.h> #include <asm/mach-au1x00/au1xxx.h> #include <asm/mach-au1x00/au1xxx_dbdma.h> #include <asm/mach-au1x00/au1xxx_ide.h> #define DRV_NAME "au1200-ide" #define DRV_AUTHOR "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>" /* enable the burstmode in the dbdma */ #define IDE_AU1XXX_BURSTMODE 1 static _auide_hwif auide_hwif; #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA) void auide_insw(unsigned long port, void *addr, u32 count) { _auide_hwif *ahwif = &auide_hwif; chan_tab_t *ctp; au1x_ddma_desc_t *dp; if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1, DDMA_FLAGS_NOIE)) { printk(KERN_ERR "%s failed %d\n", __func__, __LINE__); return; } ctp = *((chan_tab_t **)ahwif->rx_chan); dp = ctp->cur_ptr; while (dp->dscr_cmd0 & DSCR_CMD0_V) ; ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp); } void auide_outsw(unsigned long port, void *addr, u32 count) { _auide_hwif *ahwif = &auide_hwif; chan_tab_t *ctp; au1x_ddma_desc_t *dp; if(!put_source_flags(ahwif->tx_chan, (void*)addr, count << 1, DDMA_FLAGS_NOIE)) { printk(KERN_ERR "%s failed %d\n", __func__, __LINE__); return; } ctp = *((chan_tab_t **)ahwif->tx_chan); dp = ctp->cur_ptr; while (dp->dscr_cmd0 & DSCR_CMD0_V) ; ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp); } static void au1xxx_input_data(ide_drive_t *drive, struct request *rq, void *buf, unsigned int len) { auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); } static void au1xxx_output_data(ide_drive_t *drive, struct request *rq, void *buf, unsigned int len) { auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2); } #endif static void au1xxx_set_pio_mode(ide_drive_t *drive, const u8 pio) { int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2); /* set pio mode! */ switch(pio) { case 0: mem_sttime = SBC_IDE_TIMING(PIO0); /* set configuration for RCS2# */ mem_stcfg |= TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS; break; case 1: mem_sttime = SBC_IDE_TIMING(PIO1); /* set configuration for RCS2# */ mem_stcfg |= TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS; break; case 2: mem_sttime = SBC_IDE_TIMING(PIO2); /* set configuration for RCS2# */ mem_stcfg &= ~TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS; break; case 3: mem_sttime = SBC_IDE_TIMING(PIO3); /* set configuration for RCS2# */ mem_stcfg &= ~TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS; break; case 4: mem_sttime = SBC_IDE_TIMING(PIO4); /* set configuration for RCS2# */ mem_stcfg &= ~TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS; break; } au_writel(mem_sttime,MEM_STTIME2); au_writel(mem_stcfg,MEM_STCFG2); } static void auide_set_dma_mode(ide_drive_t *drive, const u8 speed) { int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2); switch(speed) { #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA case XFER_MW_DMA_2: mem_sttime = SBC_IDE_TIMING(MDMA2); /* set configuration for RCS2# */ mem_stcfg &= ~TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS; break; case XFER_MW_DMA_1: mem_sttime = SBC_IDE_TIMING(MDMA1); /* set configuration for RCS2# */ mem_stcfg &= ~TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS; break; case XFER_MW_DMA_0: mem_sttime = SBC_IDE_TIMING(MDMA0); /* set configuration for RCS2# */ mem_stcfg |= TS_MASK; mem_stcfg &= ~TCSOE_MASK; mem_stcfg &= ~TOECS_MASK; mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS; break; #endif } au_writel(mem_sttime,MEM_STTIME2); au_writel(mem_stcfg,MEM_STCFG2); } /* * Multi-Word DMA + DbDMA functions */ #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA static int auide_build_dmatable(ide_drive_t *drive) { int i, iswrite, count = 0; ide_hwif_t *hwif = HWIF(drive); struct request *rq = HWGROUP(drive)->rq; _auide_hwif *ahwif = &auide_hwif; struct scatterlist *sg; iswrite = (rq_data_dir(rq) == WRITE); /* Save for interrupt context */ ahwif->drive = drive; hwif->sg_nents = i = ide_build_sglist(drive, rq); if (!i) return 0; /* fill the descriptors */ sg = hwif->sg_table; while (i && sg_dma_len(sg)) { u32 cur_addr; u32 cur_len; cur_addr = sg_dma_address(sg); cur_len = sg_dma_len(sg); while (cur_len) { u32 flags = DDMA_FLAGS_NOIE; unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00; if (++count >= PRD_ENTRIES) { printk(KERN_WARNING "%s: DMA table too small\n", drive->name); goto use_pio_instead; } /* Lets enable intr for the last descriptor only */ if (1==i) flags = DDMA_FLAGS_IE; else flags = DDMA_FLAGS_NOIE; if (iswrite) { if(!put_source_flags(ahwif->tx_chan, (void*) sg_virt(sg), tc, flags)) { printk(KERN_ERR "%s failed %d\n", __func__, __LINE__); } } else { if(!put_dest_flags(ahwif->rx_chan, (void*) sg_virt(sg), tc, flags)) { printk(KERN_ERR "%s failed %d\n", __func__, __LINE__); } } cur_addr += tc; cur_len -= tc; } sg = sg_next(sg); i--; } if (count) return 1; use_pio_instead: ide_destroy_dmatable(drive); return 0; /* revert to PIO for this request */ } static int auide_dma_end(ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); if (hwif->sg_nents) { ide_destroy_dmatable(drive); hwif->sg_nents = 0; } return 0; } static void auide_dma_start(ide_drive_t *drive ) { } static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command) { /* issue cmd to drive */ ide_execute_command(drive, command, &ide_dma_intr, (2*WAIT_CMD), NULL); } static int auide_dma_setup(ide_drive_t *drive) { struct request *rq = HWGROUP(drive)->rq; if (!auide_build_dmatable(drive)) { ide_map_sg(drive, rq); return 1; } drive->waiting_for_dma = 1; return 0; } static int auide_dma_test_irq(ide_drive_t *drive) { /* If dbdma didn't execute the STOP command yet, the * active bit is still set */ drive->waiting_for_dma++; if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) { printk(KERN_WARNING "%s: timeout waiting for ddma to \ complete\n", drive->name); return 1; } udelay(10); return 0; } static void auide_dma_host_set(ide_drive_t *drive, int on) { } static void auide_ddma_tx_callback(int irq, void *param) { _auide_hwif *ahwif = (_auide_hwif*)param; ahwif->drive->waiting_for_dma = 0; } static void auide_ddma_rx_callback(int irq, void *param) { _auide_hwif *ahwif = (_auide_hwif*)param; ahwif->drive->waiting_for_dma = 0; } #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */ static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags) { dev->dev_id = dev_id; dev->dev_physaddr = (u32)IDE_PHYS_ADDR; dev->dev_intlevel = 0; dev->dev_intpolarity = 0; dev->dev_tsize = tsize; dev->dev_devwidth = devwidth; dev->dev_flags = flags; } #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA static const struct ide_dma_ops au1xxx_dma_ops = { .dma_host_set = auide_dma_host_set, .dma_setup = auide_dma_setup, .dma_exec_cmd = auide_dma_exec_cmd, .dma_start = auide_dma_start, .dma_end = auide_dma_end, .dma_test_irq = auide_dma_test_irq, .dma_lost_irq = ide_dma_lost_irq, .dma_timeout = ide_dma_timeout, }; static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d) { _auide_hwif *auide = &auide_hwif; dbdev_tab_t source_dev_tab, target_dev_tab; u32 dev_id, tsize, devwidth, flags; dev_id = IDE_DDMA_REQ; tsize = 8; /* 1 */ devwidth = 32; /* 16 */ #ifdef IDE_AU1XXX_BURSTMODE flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE; #else flags = DEV_FLAGS_SYNC; #endif /* setup dev_tab for tx channel */ auide_init_dbdma_dev( &source_dev_tab, dev_id, tsize, devwidth, DEV_FLAGS_OUT | flags); auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab ); auide_init_dbdma_dev( &source_dev_tab, dev_id, tsize, devwidth, DEV_FLAGS_IN | flags); auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab ); /* We also need to add a target device for the DMA */ auide_init_dbdma_dev( &target_dev_tab, (u32)DSCR_CMD0_ALWAYS, tsize, devwidth, DEV_FLAGS_ANYUSE); auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab); /* Get a channel for TX */ auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id, auide->tx_dev_id, auide_ddma_tx_callback, (void*)auide); /* Get a channel for RX */ auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id, auide->target_dev_id, auide_ddma_rx_callback, (void*)auide); auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan, NUM_DESCRIPTORS); auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan, NUM_DESCRIPTORS); /* FIXME: check return value */ (void)ide_allocate_dma_engine(hwif); au1xxx_dbdma_start( auide->tx_chan ); au1xxx_dbdma_start( auide->rx_chan ); return 0; } #else static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d) { _auide_hwif *auide = &auide_hwif; dbdev_tab_t source_dev_tab; int flags; #ifdef IDE_AU1XXX_BURSTMODE flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE; #else flags = DEV_FLAGS_SYNC; #endif /* setup dev_tab for tx channel */ auide_init_dbdma_dev( &source_dev_tab, (u32)DSCR_CMD0_ALWAYS, 8, 32, DEV_FLAGS_OUT | flags); auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab ); auide_init_dbdma_dev( &source_dev_tab, (u32)DSCR_CMD0_ALWAYS, 8, 32, DEV_FLAGS_IN | flags); auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab ); /* Get a channel for TX */ auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS, auide->tx_dev_id, NULL, (void*)auide); /* Get a channel for RX */ auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id, DSCR_CMD0_ALWAYS, NULL, (void*)auide); auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan, NUM_DESCRIPTORS); auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan, NUM_DESCRIPTORS); au1xxx_dbdma_start( auide->tx_chan ); au1xxx_dbdma_start( auide->rx_chan ); return 0; } #endif static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif) { int i; unsigned long *ata_regs = hw->io_ports_array; /* FIXME? */ for (i = 0; i < 8; i++) *ata_regs++ = ahwif->regbase + (i << IDE_REG_SHIFT); /* set the Alternative Status register */ *ata_regs = ahwif->regbase + (14 << IDE_REG_SHIFT); } #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA static const struct ide_tp_ops au1xxx_tp_ops = { .exec_command = ide_exec_command, .read_status = ide_read_status, .read_altstatus = ide_read_altstatus, .read_sff_dma_status = ide_read_sff_dma_status, .set_irq = ide_set_irq, .tf_load = ide_tf_load, .tf_read = ide_tf_read, .input_data = au1xxx_input_data, .output_data = au1xxx_output_data, }; #endif static const struct ide_port_ops au1xxx_port_ops = { .set_pio_mode = au1xxx_set_pio_mode, .set_dma_mode = auide_set_dma_mode, }; static const struct ide_port_info au1xxx_port_info = { .init_dma = auide_ddma_init, #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA .tp_ops = &au1xxx_tp_ops, #endif .port_ops = &au1xxx_port_ops, #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA .dma_ops = &au1xxx_dma_ops, #endif .host_flags = IDE_HFLAG_POST_SET_MODE | IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_UNMASK_IRQS, .pio_mask = ATA_PIO4, #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA .mwdma_mask = ATA_MWDMA2, #endif }; static int au_ide_probe(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); _auide_hwif *ahwif = &auide_hwif; struct resource *res; struct ide_host *host; int ret = 0; hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA) char *mode = "MWDMA2"; #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA) char *mode = "PIO+DDMA(offload)"; #endif memset(&auide_hwif, 0, sizeof(_auide_hwif)); ahwif->irq = platform_get_irq(pdev, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id); ret = -ENODEV; goto out; } if (ahwif->irq < 0) { pr_debug("%s %d: no IRQ\n", DRV_NAME, pdev->id); ret = -ENODEV; goto out; } if (!request_mem_region(res->start, res->end - res->start + 1, pdev->name)) { pr_debug("%s: request_mem_region failed\n", DRV_NAME); ret = -EBUSY; goto out; } ahwif->regbase = (u32)ioremap(res->start, res->end - res->start + 1); if (ahwif->regbase == 0) { ret = -ENOMEM; goto out; } memset(&hw, 0, sizeof(hw)); auide_setup_ports(&hw, ahwif); hw.irq = ahwif->irq; hw.dev = dev; hw.chipset = ide_au1xxx; ret = ide_host_add(&au1xxx_port_info, hws, &host); if (ret) goto out; auide_hwif.hwif = host->ports[0]; dev_set_drvdata(dev, host); printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode ); out: return ret; } static int au_ide_remove(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct resource *res; struct ide_host *host = dev_get_drvdata(dev); _auide_hwif *ahwif = &auide_hwif; ide_host_remove(host); iounmap((void *)ahwif->regbase); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(res->start, res->end - res->start + 1); return 0; } static struct device_driver au1200_ide_driver = { .name = "au1200-ide", .bus = &platform_bus_type, .probe = au_ide_probe, .remove = au_ide_remove, }; static int __init au_ide_init(void) { return driver_register(&au1200_ide_driver); } static void __exit au_ide_exit(void) { driver_unregister(&au1200_ide_driver); } MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("AU1200 IDE driver"); module_init(au_ide_init); module_exit(au_ide_exit);