Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 1 | /* |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 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 | |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 14 | #define DRV_NAME "tc86c001" |
Bartlomiej Zolnierkiewicz | b16040b | 2008-07-24 22:53:17 +0200 | [diff] [blame] | 15 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 16 | static void tc86c001_set_mode(ide_drive_t *drive, const u8 speed) |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 17 | { |
Bartlomiej Zolnierkiewicz | 898ec22 | 2009-01-06 17:20:52 +0100 | [diff] [blame] | 18 | ide_hwif_t *hwif = drive->hwif; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 19 | unsigned long scr_port = hwif->config_data + (drive->dn ? 0x02 : 0x00); |
Bartlomiej Zolnierkiewicz | 31e8a46 | 2007-10-19 00:30:08 +0200 | [diff] [blame] | 20 | u16 mode, scr = inw(scr_port); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 21 | |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 22 | switch (speed) { |
Paolo Ciarrocchi | 5c634bb | 2008-04-26 17:36:39 +0200 | [diff] [blame] | 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; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 37 | } |
| 38 | |
| 39 | scr &= (speed < XFER_MW_DMA_0) ? 0xf8ff : 0xff0f; |
| 40 | scr |= mode; |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 41 | outw(scr, scr_port); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 42 | } |
| 43 | |
Bartlomiej Zolnierkiewicz | 26bcb87 | 2007-10-11 23:54:00 +0200 | [diff] [blame] | 44 | static void tc86c001_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 45 | { |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 46 | tc86c001_set_mode(drive, XFER_PIO_0 + pio); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | /* |
| 50 | * HACKITY HACK |
| 51 | * |
| 52 | * This is a workaround for the limitation 5 of the TC86C001 IDE controller: |
| 53 | * if a DMA transfer terminates prematurely, the controller leaves the device's |
| 54 | * interrupt request (INTRQ) pending and does not generate a PCI interrupt (or |
| 55 | * set the interrupt bit in the DMA status register), thus no PCI interrupt |
| 56 | * will occur until a DMA transfer has been successfully completed. |
| 57 | * |
| 58 | * We work around this by initiating dummy, zero-length DMA transfer on |
| 59 | * a DMA timeout expiration. I found no better way to do this with the current |
| 60 | * IDE core than to temporarily replace a higher level driver's timer expiry |
| 61 | * handler with our own backing up to that handler in case our recovery fails. |
| 62 | */ |
| 63 | static int tc86c001_timer_expiry(ide_drive_t *drive) |
| 64 | { |
Bartlomiej Zolnierkiewicz | 898ec22 | 2009-01-06 17:20:52 +0100 | [diff] [blame] | 65 | ide_hwif_t *hwif = drive->hwif; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 66 | ide_expiry_t *expiry = ide_get_hwifdata(hwif); |
Bartlomiej Zolnierkiewicz | cab7f8e | 2008-07-23 19:55:51 +0200 | [diff] [blame] | 67 | u8 dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 68 | |
| 69 | /* Restore a higher level driver's expiry handler first. */ |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 70 | hwif->expiry = expiry; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 71 | |
| 72 | if ((dma_stat & 5) == 1) { /* DMA active and no interrupt */ |
| 73 | unsigned long sc_base = hwif->config_data; |
| 74 | unsigned long twcr_port = sc_base + (drive->dn ? 0x06 : 0x04); |
Bartlomiej Zolnierkiewicz | cab7f8e | 2008-07-23 19:55:51 +0200 | [diff] [blame] | 75 | u8 dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 76 | |
| 77 | printk(KERN_WARNING "%s: DMA interrupt possibly stuck, " |
| 78 | "attempting recovery...\n", drive->name); |
| 79 | |
| 80 | /* Stop DMA */ |
Bartlomiej Zolnierkiewicz | cab7f8e | 2008-07-23 19:55:51 +0200 | [diff] [blame] | 81 | outb(dma_cmd & ~0x01, hwif->dma_base + ATA_DMA_CMD); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 82 | |
| 83 | /* Setup the dummy DMA transfer */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 84 | outw(0, sc_base + 0x0a); /* Sector Count */ |
| 85 | outw(0, twcr_port); /* Transfer Word Count 1 or 2 */ |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 86 | |
| 87 | /* Start the dummy DMA transfer */ |
Bartlomiej Zolnierkiewicz | cab7f8e | 2008-07-23 19:55:51 +0200 | [diff] [blame] | 88 | |
| 89 | /* clear R_OR_WCTR for write */ |
| 90 | outb(0x00, hwif->dma_base + ATA_DMA_CMD); |
| 91 | /* set START_STOPBM */ |
| 92 | outb(0x01, hwif->dma_base + ATA_DMA_CMD); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 93 | |
| 94 | /* |
| 95 | * If an interrupt was pending, it should come thru shortly. |
| 96 | * If not, a higher level driver's expiry handler should |
| 97 | * eventually cause some kind of recovery from the DMA stall. |
| 98 | */ |
| 99 | return WAIT_MIN_SLEEP; |
| 100 | } |
| 101 | |
| 102 | /* Chain to the restored expiry handler if DMA wasn't active. */ |
| 103 | if (likely(expiry != NULL)) |
| 104 | return expiry(drive); |
| 105 | |
| 106 | /* If there was no handler, "emulate" that for ide_timer_expiry()... */ |
| 107 | return -1; |
| 108 | } |
| 109 | |
| 110 | static void tc86c001_dma_start(ide_drive_t *drive) |
| 111 | { |
Bartlomiej Zolnierkiewicz | 898ec22 | 2009-01-06 17:20:52 +0100 | [diff] [blame] | 112 | ide_hwif_t *hwif = drive->hwif; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 113 | unsigned long sc_base = hwif->config_data; |
| 114 | unsigned long twcr_port = sc_base + (drive->dn ? 0x06 : 0x04); |
Tejun Heo | 9780e2dd | 2009-05-07 22:24:40 +0900 | [diff] [blame] | 115 | unsigned long nsectors = blk_rq_sectors(hwif->rq); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 116 | |
| 117 | /* |
| 118 | * We have to manually load the sector count and size into |
| 119 | * the appropriate system control registers for DMA to work |
| 120 | * with LBA48 and ATAPI devices... |
| 121 | */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 122 | outw(nsectors, sc_base + 0x0a); /* Sector Count */ |
| 123 | outw(SECTOR_SIZE / 2, twcr_port); /* Transfer Word Count 1/2 */ |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 124 | |
| 125 | /* Install our timeout expiry hook, saving the current handler... */ |
Bartlomiej Zolnierkiewicz | b65fac3 | 2009-01-06 17:20:50 +0100 | [diff] [blame] | 126 | ide_set_hwifdata(hwif, hwif->expiry); |
| 127 | hwif->expiry = &tc86c001_timer_expiry; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 128 | |
| 129 | ide_dma_start(drive); |
| 130 | } |
| 131 | |
Bartlomiej Zolnierkiewicz | f454cbe | 2008-08-05 18:17:04 +0200 | [diff] [blame] | 132 | static u8 tc86c001_cable_detect(ide_hwif_t *hwif) |
Bartlomiej Zolnierkiewicz | bfa14b4 | 2008-02-02 19:56:31 +0100 | [diff] [blame] | 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 | /* |
| 139 | * System Control 1 Register bit 13 (PDIAGN): |
| 140 | * 0=80-pin cable, 1=40-pin cable |
| 141 | */ |
| 142 | return (scr1 & 0x2000) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; |
| 143 | } |
| 144 | |
Adrian Bunk | e8ab7f5 | 2007-02-07 18:18:52 +0100 | [diff] [blame] | 145 | static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif) |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 146 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 147 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 148 | unsigned long sc_base = pci_resource_start(dev, 5); |
Bartlomiej Zolnierkiewicz | 31e8a46 | 2007-10-19 00:30:08 +0200 | [diff] [blame] | 149 | u16 scr1 = inw(sc_base + 0x00); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 150 | |
| 151 | /* System Control 1 Register bit 15 (Soft Reset) set */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 152 | outw(scr1 | 0x8000, sc_base + 0x00); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 153 | |
| 154 | /* System Control 1 Register bit 14 (FIFO Reset) set */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 155 | outw(scr1 | 0x4000, sc_base + 0x00); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 156 | |
| 157 | /* System Control 1 Register: reset clear */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 158 | outw(scr1 & ~0xc000, sc_base + 0x00); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 159 | |
| 160 | /* Store the system control register base for convenience... */ |
| 161 | hwif->config_data = sc_base; |
| 162 | |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 163 | if (!hwif->dma_base) |
| 164 | return; |
| 165 | |
| 166 | /* |
| 167 | * Sector Count Control Register bits 0 and 1 set: |
| 168 | * software sets Sector Count Register for master and slave device |
| 169 | */ |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 170 | outw(0x0003, sc_base + 0x0c); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 171 | |
| 172 | /* Sector Count Register limit */ |
| 173 | hwif->rqsize = 0xffff; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 174 | } |
| 175 | |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 176 | static const struct ide_port_ops tc86c001_port_ops = { |
| 177 | .set_pio_mode = tc86c001_set_pio_mode, |
| 178 | .set_dma_mode = tc86c001_set_mode, |
| 179 | .cable_detect = tc86c001_cable_detect, |
| 180 | }; |
| 181 | |
Bartlomiej Zolnierkiewicz | f37afda | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 182 | static const struct ide_dma_ops tc86c001_dma_ops = { |
| 183 | .dma_host_set = ide_dma_host_set, |
| 184 | .dma_setup = ide_dma_setup, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 185 | .dma_start = tc86c001_dma_start, |
Bartlomiej Zolnierkiewicz | 653bcf5 | 2008-10-13 21:39:46 +0200 | [diff] [blame] | 186 | .dma_end = ide_dma_end, |
Bartlomiej Zolnierkiewicz | f37afda | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 187 | .dma_test_irq = ide_dma_test_irq, |
| 188 | .dma_lost_irq = ide_dma_lost_irq, |
Bartlomiej Zolnierkiewicz | 22117d6 | 2009-03-27 12:46:47 +0100 | [diff] [blame] | 189 | .dma_timer_expiry = ide_dma_sff_timer_expiry, |
Sergei Shtylyov | 592b531 | 2009-01-06 17:21:02 +0100 | [diff] [blame] | 190 | .dma_sff_read_status = ide_dma_sff_read_status, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 191 | }; |
| 192 | |
Bartlomiej Zolnierkiewicz | 8562043 | 2007-10-20 00:32:34 +0200 | [diff] [blame] | 193 | static const struct ide_port_info tc86c001_chipset __devinitdata = { |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 194 | .name = DRV_NAME, |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 195 | .init_hwif = init_hwif_tc86c001, |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 196 | .port_ops = &tc86c001_port_ops, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 197 | .dma_ops = &tc86c001_dma_ops, |
Bartlomiej Zolnierkiewicz | 3b2a5c7 | 2008-07-23 19:55:56 +0200 | [diff] [blame] | 198 | .host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_OFF_BOARD, |
Bartlomiej Zolnierkiewicz | 4099d14 | 2007-07-20 01:11:59 +0200 | [diff] [blame] | 199 | .pio_mask = ATA_PIO4, |
Bartlomiej Zolnierkiewicz | 5f8b6c3 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 200 | .mwdma_mask = ATA_MWDMA2, |
| 201 | .udma_mask = ATA_UDMA4, |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 202 | }; |
| 203 | |
| 204 | static int __devinit tc86c001_init_one(struct pci_dev *dev, |
| 205 | const struct pci_device_id *id) |
| 206 | { |
Bartlomiej Zolnierkiewicz | b16040b | 2008-07-24 22:53:17 +0200 | [diff] [blame] | 207 | int rc; |
| 208 | |
| 209 | rc = pci_enable_device(dev); |
| 210 | if (rc) |
| 211 | goto out; |
| 212 | |
| 213 | rc = pci_request_region(dev, 5, DRV_NAME); |
| 214 | if (rc) { |
| 215 | printk(KERN_ERR DRV_NAME ": system control regs already in use"); |
| 216 | goto out_disable; |
| 217 | } |
| 218 | |
| 219 | rc = ide_pci_init_one(dev, &tc86c001_chipset, NULL); |
| 220 | if (rc) |
| 221 | goto out_release; |
| 222 | |
| 223 | goto out; |
| 224 | |
| 225 | out_release: |
| 226 | pci_release_region(dev, 5); |
| 227 | out_disable: |
| 228 | pci_disable_device(dev); |
| 229 | out: |
| 230 | return rc; |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 231 | } |
| 232 | |
Bartlomiej Zolnierkiewicz | ea881d6 | 2008-07-24 22:53:26 +0200 | [diff] [blame] | 233 | static void __devexit tc86c001_remove(struct pci_dev *dev) |
| 234 | { |
| 235 | ide_pci_remove(dev); |
| 236 | pci_release_region(dev, 5); |
| 237 | pci_disable_device(dev); |
| 238 | } |
| 239 | |
Bartlomiej Zolnierkiewicz | 9cbcc5e | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 240 | static const struct pci_device_id tc86c001_pci_tbl[] = { |
| 241 | { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_IDE), 0 }, |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 242 | { 0, } |
| 243 | }; |
| 244 | MODULE_DEVICE_TABLE(pci, tc86c001_pci_tbl); |
| 245 | |
Bartlomiej Zolnierkiewicz | a9ab09e2 | 2008-10-13 21:39:41 +0200 | [diff] [blame] | 246 | static struct pci_driver tc86c001_pci_driver = { |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 247 | .name = "TC86C001", |
| 248 | .id_table = tc86c001_pci_tbl, |
Bartlomiej Zolnierkiewicz | ea881d6 | 2008-07-24 22:53:26 +0200 | [diff] [blame] | 249 | .probe = tc86c001_init_one, |
Adrian Bunk | a69999e | 2008-08-18 21:40:03 +0200 | [diff] [blame] | 250 | .remove = __devexit_p(tc86c001_remove), |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 251 | }; |
| 252 | |
Bartlomiej Zolnierkiewicz | a534b68 | 2007-02-07 18:19:09 +0100 | [diff] [blame] | 253 | static int __init tc86c001_ide_init(void) |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 254 | { |
Bartlomiej Zolnierkiewicz | a9ab09e2 | 2008-10-13 21:39:41 +0200 | [diff] [blame] | 255 | return ide_pci_register_driver(&tc86c001_pci_driver); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 256 | } |
Bartlomiej Zolnierkiewicz | ea881d6 | 2008-07-24 22:53:26 +0200 | [diff] [blame] | 257 | |
| 258 | static void __exit tc86c001_ide_exit(void) |
| 259 | { |
Bartlomiej Zolnierkiewicz | a9ab09e2 | 2008-10-13 21:39:41 +0200 | [diff] [blame] | 260 | pci_unregister_driver(&tc86c001_pci_driver); |
Bartlomiej Zolnierkiewicz | ea881d6 | 2008-07-24 22:53:26 +0200 | [diff] [blame] | 261 | } |
| 262 | |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 263 | module_init(tc86c001_ide_init); |
Bartlomiej Zolnierkiewicz | ea881d6 | 2008-07-24 22:53:26 +0200 | [diff] [blame] | 264 | module_exit(tc86c001_ide_exit); |
Sergei Shtylyov | 33dced2 | 2007-02-07 18:18:45 +0100 | [diff] [blame] | 265 | |
| 266 | MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>"); |
| 267 | MODULE_DESCRIPTION("PCI driver module for TC86C001 IDE"); |
| 268 | MODULE_LICENSE("GPL"); |