Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 1 | /* |
| 2 | * New ATA layer SC1200 driver Alan Cox <alan@redhat.com> |
| 3 | * |
| 4 | * TODO: Mode selection filtering |
| 5 | * TODO: Can't enable second channel until ATA core has serialize |
| 6 | * TODO: Needs custom DMA cleanup code |
| 7 | * |
| 8 | * Based very heavily on |
| 9 | * |
| 10 | * linux/drivers/ide/pci/sc1200.c Version 0.91 28-Jan-2003 |
| 11 | * |
| 12 | * Copyright (C) 2000-2002 Mark Lord <mlord@pobox.com> |
| 13 | * May be copied or modified under the terms of the GNU General Public License |
| 14 | * |
| 15 | * Development of this chipset driver was funded |
| 16 | * by the nice folks at National Semiconductor. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify |
| 19 | * it under the terms of the GNU General Public License version 2 as |
| 20 | * published by the Free Software Foundation. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, |
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | * GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 30 | * |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 31 | */ |
| 32 | |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/pci.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/blkdev.h> |
| 38 | #include <linux/delay.h> |
| 39 | #include <scsi/scsi_host.h> |
| 40 | #include <linux/libata.h> |
| 41 | |
| 42 | #define DRV_NAME "sc1200" |
Alan | 30ced0f | 2006-11-22 16:57:36 +0000 | [diff] [blame] | 43 | #define DRV_VERSION "0.2.4" |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 44 | |
| 45 | #define SC1200_REV_A 0x00 |
| 46 | #define SC1200_REV_B1 0x01 |
| 47 | #define SC1200_REV_B3 0x02 |
| 48 | #define SC1200_REV_C1 0x03 |
| 49 | #define SC1200_REV_D1 0x04 |
| 50 | |
| 51 | /** |
| 52 | * sc1200_clock - PCI clock |
| 53 | * |
| 54 | * Return the PCI bus clocking for the SC1200 chipset configuration |
| 55 | * in use. We return 0 for 33MHz 1 for 48MHz and 2 for 66Mhz |
| 56 | */ |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 57 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 58 | static int sc1200_clock(void) |
| 59 | { |
| 60 | /* Magic registers that give us the chipset data */ |
| 61 | u8 chip_id = inb(0x903C); |
| 62 | u8 silicon_rev = inb(0x903D); |
| 63 | u16 pci_clock; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 64 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 65 | if (chip_id == 0x04 && silicon_rev < SC1200_REV_B1) |
| 66 | return 0; /* 33 MHz mode */ |
| 67 | |
| 68 | /* Clock generator configuration 0x901E its 8/9 are the PCI clocking |
| 69 | 0/3 is 33Mhz 1 is 48 2 is 66 */ |
| 70 | |
| 71 | pci_clock = inw(0x901E); |
| 72 | pci_clock >>= 8; |
| 73 | pci_clock &= 0x03; |
| 74 | if (pci_clock == 3) |
| 75 | pci_clock = 0; |
| 76 | return pci_clock; |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * sc1200_set_piomode - PIO setup |
| 81 | * @ap: ATA interface |
| 82 | * @adev: device on the interface |
| 83 | * |
| 84 | * Set our PIO requirements. This is fairly simple on the SC1200 |
| 85 | */ |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 86 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 87 | static void sc1200_set_piomode(struct ata_port *ap, struct ata_device *adev) |
| 88 | { |
| 89 | static const u32 pio_timings[4][5] = { |
| 90 | {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, // format0 33Mhz |
| 91 | {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}, // format1, 33Mhz |
| 92 | {0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021}, // format1, 48Mhz |
| 93 | {0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131} // format1, 66Mhz |
| 94 | }; |
| 95 | |
| 96 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| 97 | u32 format; |
| 98 | unsigned int reg = 0x40 + 0x10 * ap->port_no; |
| 99 | int mode = adev->pio_mode - XFER_PIO_0; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 100 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 101 | pci_read_config_dword(pdev, reg + 4, &format); |
| 102 | format >>= 31; |
| 103 | format += sc1200_clock(); |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 104 | pci_write_config_dword(pdev, reg + 8 * adev->devno, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 105 | pio_timings[format][mode]); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * sc1200_set_dmamode - DMA timing setup |
| 110 | * @ap: ATA interface |
| 111 | * @adev: Device being configured |
| 112 | * |
| 113 | * We cannot mix MWDMA and UDMA without reloading timings each switch |
| 114 | * master to slave. |
| 115 | */ |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 116 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 117 | static void sc1200_set_dmamode(struct ata_port *ap, struct ata_device *adev) |
| 118 | { |
| 119 | static const u32 udma_timing[3][3] = { |
| 120 | { 0x00921250, 0x00911140, 0x00911030 }, |
| 121 | { 0x00932470, 0x00922260, 0x00922140 }, |
| 122 | { 0x009436A1, 0x00933481, 0x00923261 } |
| 123 | }; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 124 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 125 | static const u32 mwdma_timing[3][3] = { |
| 126 | { 0x00077771, 0x00012121, 0x00002020 }, |
| 127 | { 0x000BBBB2, 0x00024241, 0x00013131 }, |
| 128 | { 0x000FFFF3, 0x00035352, 0x00015151 } |
| 129 | }; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 130 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 131 | int clock = sc1200_clock(); |
| 132 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| 133 | unsigned int reg = 0x40 + 0x10 * ap->port_no; |
| 134 | int mode = adev->dma_mode; |
| 135 | u32 format; |
| 136 | |
| 137 | if (mode >= XFER_UDMA_0) |
| 138 | format = udma_timing[clock][mode - XFER_UDMA_0]; |
| 139 | else |
| 140 | format = mwdma_timing[clock][mode - XFER_MW_DMA_0]; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 141 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 142 | if (adev->devno == 0) { |
| 143 | u32 timings; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 144 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 145 | pci_read_config_dword(pdev, reg + 4, &timings); |
| 146 | timings &= 0x80000000UL; |
| 147 | timings |= format; |
| 148 | pci_write_config_dword(pdev, reg + 4, timings); |
| 149 | } else |
| 150 | pci_write_config_dword(pdev, reg + 12, format); |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * sc1200_qc_issue_prot - command issue |
| 155 | * @qc: command pending |
| 156 | * |
| 157 | * Called when the libata layer is about to issue a command. We wrap |
| 158 | * this interface so that we can load the correct ATA timings if |
| 159 | * neccessary. Specifically we have a problem that there is only |
| 160 | * one MWDMA/UDMA bit. |
| 161 | */ |
| 162 | |
| 163 | static unsigned int sc1200_qc_issue_prot(struct ata_queued_cmd *qc) |
| 164 | { |
| 165 | struct ata_port *ap = qc->ap; |
| 166 | struct ata_device *adev = qc->dev; |
| 167 | struct ata_device *prev = ap->private_data; |
| 168 | |
| 169 | /* See if the DMA settings could be wrong */ |
| 170 | if (adev->dma_mode != 0 && adev != prev && prev != NULL) { |
| 171 | /* Maybe, but do the channels match MWDMA/UDMA ? */ |
| 172 | if ((adev->dma_mode >= XFER_UDMA_0 && prev->dma_mode < XFER_UDMA_0) || |
| 173 | (adev->dma_mode < XFER_UDMA_0 && prev->dma_mode >= XFER_UDMA_0)) |
| 174 | /* Switch the mode bits */ |
| 175 | sc1200_set_dmamode(ap, adev); |
| 176 | } |
| 177 | |
| 178 | return ata_qc_issue_prot(qc); |
| 179 | } |
| 180 | |
| 181 | static struct scsi_host_template sc1200_sht = { |
| 182 | .module = THIS_MODULE, |
| 183 | .name = DRV_NAME, |
| 184 | .ioctl = ata_scsi_ioctl, |
| 185 | .queuecommand = ata_scsi_queuecmd, |
| 186 | .can_queue = ATA_DEF_QUEUE, |
| 187 | .this_id = ATA_SHT_THIS_ID, |
| 188 | .sg_tablesize = LIBATA_MAX_PRD, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 189 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
| 190 | .emulated = ATA_SHT_EMULATED, |
| 191 | .use_clustering = ATA_SHT_USE_CLUSTERING, |
| 192 | .proc_name = DRV_NAME, |
| 193 | .dma_boundary = ATA_DMA_BOUNDARY, |
| 194 | .slave_configure = ata_scsi_slave_config, |
Tejun Heo | afdfe89 | 2006-11-29 11:26:47 +0900 | [diff] [blame] | 195 | .slave_destroy = ata_scsi_slave_destroy, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 196 | .bios_param = ata_std_bios_param, |
| 197 | }; |
| 198 | |
| 199 | static struct ata_port_operations sc1200_port_ops = { |
| 200 | .port_disable = ata_port_disable, |
| 201 | .set_piomode = sc1200_set_piomode, |
| 202 | .set_dmamode = sc1200_set_dmamode, |
| 203 | .mode_filter = ata_pci_default_filter, |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 204 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 205 | .tf_load = ata_tf_load, |
| 206 | .tf_read = ata_tf_read, |
| 207 | .check_status = ata_check_status, |
| 208 | .exec_command = ata_exec_command, |
| 209 | .dev_select = ata_std_dev_select, |
| 210 | |
Jeff Garzik | bf7551c | 2007-03-02 18:09:05 -0500 | [diff] [blame] | 211 | .freeze = ata_bmdma_freeze, |
| 212 | .thaw = ata_bmdma_thaw, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 213 | .error_handler = ata_bmdma_error_handler, |
Jeff Garzik | bf7551c | 2007-03-02 18:09:05 -0500 | [diff] [blame] | 214 | .post_internal_cmd = ata_bmdma_post_internal_cmd, |
Alan Cox | 745975c | 2007-03-08 22:58:03 +0000 | [diff] [blame] | 215 | .cable_detect = ata_cable_40wire, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 216 | |
| 217 | .bmdma_setup = ata_bmdma_setup, |
| 218 | .bmdma_start = ata_bmdma_start, |
| 219 | .bmdma_stop = ata_bmdma_stop, |
| 220 | .bmdma_status = ata_bmdma_status, |
| 221 | |
| 222 | .qc_prep = ata_qc_prep, |
| 223 | .qc_issue = sc1200_qc_issue_prot, |
Jeff Garzik | bda3028 | 2006-09-27 05:41:13 -0400 | [diff] [blame] | 224 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 225 | .data_xfer = ata_data_xfer, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 226 | |
| 227 | .irq_handler = ata_interrupt, |
| 228 | .irq_clear = ata_bmdma_irq_clear, |
Akira Iguchi | 246ce3b | 2007-01-26 16:27:58 +0900 | [diff] [blame] | 229 | .irq_on = ata_irq_on, |
| 230 | .irq_ack = ata_irq_ack, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 231 | |
| 232 | .port_start = ata_port_start, |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 233 | }; |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 234 | |
| 235 | /** |
| 236 | * sc1200_init_one - Initialise an SC1200 |
| 237 | * @dev: PCI device |
| 238 | * @id: Entry in match table |
| 239 | * |
| 240 | * Just throw the needed data at the libata helper and it does all |
| 241 | * our work. |
| 242 | */ |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 243 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 244 | static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 245 | { |
| 246 | static struct ata_port_info info = { |
| 247 | .sht = &sc1200_sht, |
| 248 | .flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST, |
| 249 | .pio_mask = 0x1f, |
| 250 | .mwdma_mask = 0x07, |
| 251 | .udma_mask = 0x07, |
| 252 | .port_ops = &sc1200_port_ops |
| 253 | }; |
| 254 | static struct ata_port_info *port_info[2] = { &info, &info }; |
Jeff Garzik | 85cd725 | 2006-08-31 00:03:49 -0400 | [diff] [blame] | 255 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 256 | /* Can't enable port 2 yet, see top comments */ |
| 257 | return ata_pci_init_one(dev, port_info, 1); |
| 258 | } |
| 259 | |
Jeff Garzik | 2d2744f | 2006-09-28 20:21:59 -0400 | [diff] [blame] | 260 | static const struct pci_device_id sc1200[] = { |
| 261 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), }, |
| 262 | |
| 263 | { }, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 264 | }; |
| 265 | |
| 266 | static struct pci_driver sc1200_pci_driver = { |
Jeff Garzik | 2d2744f | 2006-09-28 20:21:59 -0400 | [diff] [blame] | 267 | .name = DRV_NAME, |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 268 | .id_table = sc1200, |
| 269 | .probe = sc1200_init_one, |
Alan | 30ced0f | 2006-11-22 16:57:36 +0000 | [diff] [blame] | 270 | .remove = ata_pci_remove_one, |
Tejun Heo | 438ac6d | 2007-03-02 17:31:26 +0900 | [diff] [blame] | 271 | #ifdef CONFIG_PM |
Alan | 30ced0f | 2006-11-22 16:57:36 +0000 | [diff] [blame] | 272 | .suspend = ata_pci_device_suspend, |
| 273 | .resume = ata_pci_device_resume, |
Tejun Heo | 438ac6d | 2007-03-02 17:31:26 +0900 | [diff] [blame] | 274 | #endif |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 275 | }; |
| 276 | |
| 277 | static int __init sc1200_init(void) |
| 278 | { |
| 279 | return pci_register_driver(&sc1200_pci_driver); |
| 280 | } |
| 281 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 282 | static void __exit sc1200_exit(void) |
| 283 | { |
| 284 | pci_unregister_driver(&sc1200_pci_driver); |
| 285 | } |
| 286 | |
Jeff Garzik | 669a5db | 2006-08-29 18:12:40 -0400 | [diff] [blame] | 287 | MODULE_AUTHOR("Alan Cox, Mark Lord"); |
| 288 | MODULE_DESCRIPTION("low-level driver for the NS/AMD SC1200"); |
| 289 | MODULE_LICENSE("GPL"); |
| 290 | MODULE_DEVICE_TABLE(pci, sc1200); |
| 291 | MODULE_VERSION(DRV_VERSION); |
| 292 | |
| 293 | module_init(sc1200_init); |
| 294 | module_exit(sc1200_exit); |