1 /* 2 * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer 3 * (C) 2006 Red Hat Inc 4 * Alan Cox <alan@redhat.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; see the file COPYING. If not, write to 18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/pci.h> 24 #include <linux/init.h> 25 #include <linux/blkdev.h> 26 #include <linux/delay.h> 27 #include <scsi/scsi_host.h> 28 #include <linux/libata.h> 29 30 #define DRV_NAME "pata_ns87410" 31 #define DRV_VERSION "0.4.6" 32 33 /** 34 * ns87410_pre_reset - probe begin 35 * @link: ATA link 36 * @deadline: deadline jiffies for the operation 37 * 38 * Check enabled ports 39 */ 40 41 static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline) 42 { 43 struct ata_port *ap = link->ap; 44 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 45 static const struct pci_bits ns87410_enable_bits[] = { 46 { 0x43, 1, 0x08, 0x08 }, 47 { 0x47, 1, 0x08, 0x08 } 48 }; 49 50 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no])) 51 return -ENOENT; 52 53 return ata_std_prereset(link, deadline); 54 } 55 56 /** 57 * ns87410_error_handler - probe reset 58 * @ap: ATA port 59 * 60 * Perform the ATA probe and bus reset sequence plus specific handling 61 * for this hardware. The MPIIX has the enable bits in a different place 62 * to PIIX4 and friends. As a pure PIO device it has no cable detect 63 */ 64 65 static void ns87410_error_handler(struct ata_port *ap) 66 { 67 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 68 } 69 70 /** 71 * ns87410_set_piomode - set initial PIO mode data 72 * @ap: ATA interface 73 * @adev: ATA device 74 * 75 * Program timing data. This is kept per channel not per device, 76 * and only affects the data port. 77 */ 78 79 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev) 80 { 81 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 82 int port = 0x40 + 4 * ap->port_no; 83 u8 idetcr, idefr; 84 struct ata_timing at; 85 86 static const u8 activebits[15] = { 87 0, 1, 2, 3, 4, 88 5, 5, 6, 6, 6, 89 6, 7, 7, 7, 7 90 }; 91 92 static const u8 recoverbits[12] = { 93 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7 94 }; 95 96 pci_read_config_byte(pdev, port + 3, &idefr); 97 98 if (ata_pio_need_iordy(adev)) 99 idefr |= 0x04; /* IORDY enable */ 100 else 101 idefr &= ~0x04; 102 103 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) { 104 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode); 105 return; 106 } 107 108 at.active = FIT(at.active, 2, 16) - 2; 109 at.setup = FIT(at.setup, 1, 4) - 1; 110 at.recover = FIT(at.recover, 1, 12) - 1; 111 112 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active]; 113 114 pci_write_config_byte(pdev, port, idetcr); 115 pci_write_config_byte(pdev, port + 3, idefr); 116 /* We use ap->private_data as a pointer to the device currently 117 loaded for timing */ 118 ap->private_data = adev; 119 } 120 121 /** 122 * ns87410_qc_issue_prot - command issue 123 * @qc: command pending 124 * 125 * Called when the libata layer is about to issue a command. We wrap 126 * this interface so that we can load the correct ATA timings if 127 * necessary. 128 */ 129 130 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc) 131 { 132 struct ata_port *ap = qc->ap; 133 struct ata_device *adev = qc->dev; 134 135 /* If modes have been configured and the channel data is not loaded 136 then load it. We have to check if pio_mode is set as the core code 137 does not set adev->pio_mode to XFER_PIO_0 while probing as would be 138 logical */ 139 140 if (adev->pio_mode && adev != ap->private_data) 141 ns87410_set_piomode(ap, adev); 142 143 return ata_qc_issue_prot(qc); 144 } 145 146 static struct scsi_host_template ns87410_sht = { 147 .module = THIS_MODULE, 148 .name = DRV_NAME, 149 .ioctl = ata_scsi_ioctl, 150 .queuecommand = ata_scsi_queuecmd, 151 .can_queue = ATA_DEF_QUEUE, 152 .this_id = ATA_SHT_THIS_ID, 153 .sg_tablesize = LIBATA_MAX_PRD, 154 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 155 .emulated = ATA_SHT_EMULATED, 156 .use_clustering = ATA_SHT_USE_CLUSTERING, 157 .proc_name = DRV_NAME, 158 .dma_boundary = ATA_DMA_BOUNDARY, 159 .slave_configure = ata_scsi_slave_config, 160 .slave_destroy = ata_scsi_slave_destroy, 161 .bios_param = ata_std_bios_param, 162 }; 163 164 static struct ata_port_operations ns87410_port_ops = { 165 .set_piomode = ns87410_set_piomode, 166 167 .tf_load = ata_tf_load, 168 .tf_read = ata_tf_read, 169 .check_status = ata_check_status, 170 .exec_command = ata_exec_command, 171 .dev_select = ata_std_dev_select, 172 173 .freeze = ata_bmdma_freeze, 174 .thaw = ata_bmdma_thaw, 175 .error_handler = ns87410_error_handler, 176 .post_internal_cmd = ata_bmdma_post_internal_cmd, 177 .cable_detect = ata_cable_40wire, 178 179 .qc_prep = ata_qc_prep, 180 .qc_issue = ns87410_qc_issue_prot, 181 182 .data_xfer = ata_data_xfer, 183 184 .irq_handler = ata_interrupt, 185 .irq_clear = ata_bmdma_irq_clear, 186 .irq_on = ata_irq_on, 187 188 .port_start = ata_sff_port_start, 189 }; 190 191 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) 192 { 193 static const struct ata_port_info info = { 194 .sht = &ns87410_sht, 195 .flags = ATA_FLAG_SLAVE_POSS, 196 .pio_mask = 0x0F, 197 .port_ops = &ns87410_port_ops 198 }; 199 const struct ata_port_info *ppi[] = { &info, NULL }; 200 return ata_pci_init_one(dev, ppi); 201 } 202 203 static const struct pci_device_id ns87410[] = { 204 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), }, 205 206 { }, 207 }; 208 209 static struct pci_driver ns87410_pci_driver = { 210 .name = DRV_NAME, 211 .id_table = ns87410, 212 .probe = ns87410_init_one, 213 .remove = ata_pci_remove_one, 214 #ifdef CONFIG_PM 215 .suspend = ata_pci_device_suspend, 216 .resume = ata_pci_device_resume, 217 #endif 218 }; 219 220 static int __init ns87410_init(void) 221 { 222 return pci_register_driver(&ns87410_pci_driver); 223 } 224 225 static void __exit ns87410_exit(void) 226 { 227 pci_unregister_driver(&ns87410_pci_driver); 228 } 229 230 MODULE_AUTHOR("Alan Cox"); 231 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410"); 232 MODULE_LICENSE("GPL"); 233 MODULE_DEVICE_TABLE(pci, ns87410); 234 MODULE_VERSION(DRV_VERSION); 235 236 module_init(ns87410_init); 237 module_exit(ns87410_exit); 238