1/* 2 * Copyright (C) 2002 Toshiba Corporation 3 * Copyright (C) 2005-2006 MontaVista Software, Inc. <source@mvista.com> 4 * 5 * This file is licensed under the terms of the GNU General Public 6 * License version 2. This program is licensed "as is" without any 7 * warranty of any kind, whether express or implied. 8 */ 9 10#include <linux/types.h> 11#include <linux/pci.h> 12#include <linux/ide.h> 13 14#define DRV_NAME "tc86c001" 15 16static void tc86c001_set_mode(ide_hwif_t *hwif, ide_drive_t *drive) 17{ 18 unsigned long scr_port = hwif->config_data + (drive->dn ? 0x02 : 0x00); 19 u16 mode, scr = inw(scr_port); 20 const u8 speed = drive->dma_mode; 21 22 switch (speed) { 23 case XFER_UDMA_4: mode = 0x00c0; break; 24 case XFER_UDMA_3: mode = 0x00b0; break; 25 case XFER_UDMA_2: mode = 0x00a0; break; 26 case XFER_UDMA_1: mode = 0x0090; break; 27 case XFER_UDMA_0: mode = 0x0080; break; 28 case XFER_MW_DMA_2: mode = 0x0070; break; 29 case XFER_MW_DMA_1: mode = 0x0060; break; 30 case XFER_MW_DMA_0: mode = 0x0050; break; 31 case XFER_PIO_4: mode = 0x0400; break; 32 case XFER_PIO_3: mode = 0x0300; break; 33 case XFER_PIO_2: mode = 0x0200; break; 34 case XFER_PIO_1: mode = 0x0100; break; 35 case XFER_PIO_0: 36 default: mode = 0x0000; break; 37 } 38 39 scr &= (speed < XFER_MW_DMA_0) ? 0xf8ff : 0xff0f; 40 scr |= mode; 41 outw(scr, scr_port); 42} 43 44static void tc86c001_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) 45{ 46 drive->dma_mode = drive->pio_mode; 47 tc86c001_set_mode(hwif, drive); 48} 49 50static int tc86c001_timer_expiry(ide_drive_t *drive) 51{ 52 ide_hwif_t *hwif = drive->hwif; 53 ide_expiry_t *expiry = ide_get_hwifdata(hwif); 54 u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS); 55 56 /* Restore a higher level driver's expiry handler first. */ 57 hwif->expiry = expiry; 58 59 if ((dma_stat & 5) == 1) { /* DMA active and no interrupt */ 60 unsigned long sc_base = hwif->config_data; 61 unsigned long twcr_port = sc_base + (drive->dn ? 0x06 : 0x04); 62 u8 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD); 63 64 printk(KERN_WARNING "%s: DMA interrupt possibly stuck, " 65 "attempting recovery...\n", drive->name); 66 67 /* Stop DMA */ 68 outb(dma_cmd & ~0x01, hwif->dma_base + ATA_DMA_CMD); 69 70 /* Setup the dummy DMA transfer */ 71 outw(0, sc_base + 0x0a); /* Sector Count */ 72 outw(0, twcr_port); /* Transfer Word Count 1 or 2 */ 73 74 /* Start the dummy DMA transfer */ 75 76 /* clear R_OR_WCTR for write */ 77 outb(0x00, hwif->dma_base + ATA_DMA_CMD); 78 /* set START_STOPBM */ 79 outb(0x01, hwif->dma_base + ATA_DMA_CMD); 80 81 /* 82 * If an interrupt was pending, it should come thru shortly. 83 * If not, a higher level driver's expiry handler should 84 * eventually cause some kind of recovery from the DMA stall. 85 */ 86 return WAIT_MIN_SLEEP; 87 } 88 89 /* Chain to the restored expiry handler if DMA wasn't active. */ 90 if (likely(expiry != NULL)) 91 return expiry(drive); 92 93 /* If there was no handler, "emulate" that for ide_timer_expiry()... */ 94 return -1; 95} 96 97static void tc86c001_dma_start(ide_drive_t *drive) 98{ 99 ide_hwif_t *hwif = drive->hwif; 100 unsigned long sc_base = hwif->config_data; 101 unsigned long twcr_port = sc_base + (drive->dn ? 0x06 : 0x04); 102 unsigned long nsectors = blk_rq_sectors(hwif->rq); 103 104 /* 105 * We have to manually load the sector count and size into 106 * the appropriate system control registers for DMA to work 107 * with LBA48 and ATAPI devices... 108 */ 109 outw(nsectors, sc_base + 0x0a); /* Sector Count */ 110 outw(SECTOR_SIZE / 2, twcr_port); /* Transfer Word Count 1/2 */ 111 112 /* Install our timeout expiry hook, saving the current handler... */ 113 ide_set_hwifdata(hwif, hwif->expiry); 114 hwif->expiry = &tc86c001_timer_expiry; 115 116 ide_dma_start(drive); 117} 118 119static u8 tc86c001_cable_detect(ide_hwif_t *hwif) 120{ 121 struct pci_dev *dev = to_pci_dev(hwif->dev); 122 unsigned long sc_base = pci_resource_start(dev, 5); 123 u16 scr1 = inw(sc_base + 0x00); 124 125 /* 126 * System Control 1 Register bit 13 (PDIAGN): 127 * 0=80-pin cable, 1=40-pin cable 128 */ 129 return (scr1 & 0x2000) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; 130} 131 132static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif) 133{ 134 struct pci_dev *dev = to_pci_dev(hwif->dev); 135 unsigned long sc_base = pci_resource_start(dev, 5); 136 u16 scr1 = inw(sc_base + 0x00); 137 138 /* System Control 1 Register bit 15 (Soft Reset) set */ 139 outw(scr1 | 0x8000, sc_base + 0x00); 140 141 /* System Control 1 Register bit 14 (FIFO Reset) set */ 142 outw(scr1 | 0x4000, sc_base + 0x00); 143 144 /* System Control 1 Register: reset clear */ 145 outw(scr1 & ~0xc000, sc_base + 0x00); 146 147 /* Store the system control register base for convenience... */ 148 hwif->config_data = sc_base; 149 150 if (!hwif->dma_base) 151 return; 152 153 /* 154 * Sector Count Control Register bits 0 and 1 set: 155 * software sets Sector Count Register for master and slave device 156 */ 157 outw(0x0003, sc_base + 0x0c); 158 159 /* Sector Count Register limit */ 160 hwif->rqsize = 0xffff; 161} 162 163static const struct ide_port_ops tc86c001_port_ops = { 164 .set_pio_mode = tc86c001_set_pio_mode, 165 .set_dma_mode = tc86c001_set_mode, 166 .cable_detect = tc86c001_cable_detect, 167}; 168 169static const struct ide_dma_ops tc86c001_dma_ops = { 170 .dma_host_set = ide_dma_host_set, 171 .dma_setup = ide_dma_setup, 172 .dma_start = tc86c001_dma_start, 173 .dma_end = ide_dma_end, 174 .dma_test_irq = ide_dma_test_irq, 175 .dma_lost_irq = ide_dma_lost_irq, 176 .dma_timer_expiry = ide_dma_sff_timer_expiry, 177 .dma_sff_read_status = ide_dma_sff_read_status, 178}; 179 180static const struct ide_port_info tc86c001_chipset __devinitdata = { 181 .name = DRV_NAME, 182 .init_hwif = init_hwif_tc86c001, 183 .port_ops = &tc86c001_port_ops, 184 .dma_ops = &tc86c001_dma_ops, 185 .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_OFF_BOARD, 186 .pio_mask = ATA_PIO4, 187 .mwdma_mask = ATA_MWDMA2, 188 .udma_mask = ATA_UDMA4, 189}; 190 191static int __devinit tc86c001_init_one(struct pci_dev *dev, 192 const struct pci_device_id *id) 193{ 194 int rc; 195 196 rc = pci_enable_device(dev); 197 if (rc) 198 goto out; 199 200 rc = pci_request_region(dev, 5, DRV_NAME); 201 if (rc) { 202 printk(KERN_ERR DRV_NAME ": system control regs already in use"); 203 goto out_disable; 204 } 205 206 rc = ide_pci_init_one(dev, &tc86c001_chipset, NULL); 207 if (rc) 208 goto out_release; 209 210 goto out; 211 212out_release: 213 pci_release_region(dev, 5); 214out_disable: 215 pci_disable_device(dev); 216out: 217 return rc; 218} 219 220static void __devexit tc86c001_remove(struct pci_dev *dev) 221{ 222 ide_pci_remove(dev); 223 pci_release_region(dev, 5); 224 pci_disable_device(dev); 225} 226 227static const struct pci_device_id tc86c001_pci_tbl[] = { 228 { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_IDE), 0 }, 229 { 0, } 230}; 231MODULE_DEVICE_TABLE(pci, tc86c001_pci_tbl); 232 233static struct pci_driver tc86c001_pci_driver = { 234 .name = "TC86C001", 235 .id_table = tc86c001_pci_tbl, 236 .probe = tc86c001_init_one, 237 .remove = __devexit_p(tc86c001_remove), 238}; 239 240static int __init tc86c001_ide_init(void) 241{ 242 return ide_pci_register_driver(&tc86c001_pci_driver); 243} 244 245static void __exit tc86c001_ide_exit(void) 246{ 247 pci_unregister_driver(&tc86c001_pci_driver); 248} 249 250module_init(tc86c001_ide_init); 251module_exit(tc86c001_ide_exit); 252 253MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>"); 254MODULE_DESCRIPTION("PCI driver module for TC86C001 IDE"); 255MODULE_LICENSE("GPL"); 256