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 * @ap: ATA port 36 * @deadline: deadline jiffies for the operation 37 * 38 * Check enabled ports 39 */ 40 41 static int ns87410_pre_reset(struct ata_port *ap, unsigned long deadline) 42 { 43 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 44 static const struct pci_bits ns87410_enable_bits[] = { 45 { 0x43, 1, 0x08, 0x08 }, 46 { 0x47, 1, 0x08, 0x08 } 47 }; 48 49 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no])) 50 return -ENOENT; 51 52 return ata_std_prereset(ap, deadline); 53 } 54 55 /** 56 * ns87410_error_handler - probe reset 57 * @ap: ATA port 58 * 59 * Perform the ATA probe and bus reset sequence plus specific handling 60 * for this hardware. The MPIIX has the enable bits in a different place 61 * to PIIX4 and friends. As a pure PIO device it has no cable detect 62 */ 63 64 static void ns87410_error_handler(struct ata_port *ap) 65 { 66 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 67 } 68 69 /** 70 * ns87410_set_piomode - set initial PIO mode data 71 * @ap: ATA interface 72 * @adev: ATA device 73 * 74 * Program timing data. This is kept per channel not per device, 75 * and only affects the data port. 76 */ 77 78 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev) 79 { 80 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 81 int port = 0x40 + 4 * ap->port_no; 82 u8 idetcr, idefr; 83 struct ata_timing at; 84 85 static const u8 activebits[15] = { 86 0, 1, 2, 3, 4, 87 5, 5, 6, 6, 6, 88 6, 7, 7, 7, 7 89 }; 90 91 static const u8 recoverbits[12] = { 92 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7 93 }; 94 95 pci_read_config_byte(pdev, port + 3, &idefr); 96 97 if (ata_pio_need_iordy(adev)) 98 idefr |= 0x04; /* IORDY enable */ 99 else 100 idefr &= ~0x04; 101 102 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) { 103 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode); 104 return; 105 } 106 107 at.active = FIT(at.active, 2, 16) - 2; 108 at.setup = FIT(at.setup, 1, 4) - 1; 109 at.recover = FIT(at.recover, 1, 12) - 1; 110 111 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active]; 112 113 pci_write_config_byte(pdev, port, idetcr); 114 pci_write_config_byte(pdev, port + 3, idefr); 115 /* We use ap->private_data as a pointer to the device currently 116 loaded for timing */ 117 ap->private_data = adev; 118 } 119 120 /** 121 * ns87410_qc_issue_prot - command issue 122 * @qc: command pending 123 * 124 * Called when the libata layer is about to issue a command. We wrap 125 * this interface so that we can load the correct ATA timings if 126 * neccessary. 127 */ 128 129 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc) 130 { 131 struct ata_port *ap = qc->ap; 132 struct ata_device *adev = qc->dev; 133 134 /* If modes have been configured and the channel data is not loaded 135 then load it. We have to check if pio_mode is set as the core code 136 does not set adev->pio_mode to XFER_PIO_0 while probing as would be 137 logical */ 138 139 if (adev->pio_mode && adev != ap->private_data) 140 ns87410_set_piomode(ap, adev); 141 142 return ata_qc_issue_prot(qc); 143 } 144 145 static struct scsi_host_template ns87410_sht = { 146 .module = THIS_MODULE, 147 .name = DRV_NAME, 148 .ioctl = ata_scsi_ioctl, 149 .queuecommand = ata_scsi_queuecmd, 150 .can_queue = ATA_DEF_QUEUE, 151 .this_id = ATA_SHT_THIS_ID, 152 .sg_tablesize = LIBATA_MAX_PRD, 153 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 154 .emulated = ATA_SHT_EMULATED, 155 .use_clustering = ATA_SHT_USE_CLUSTERING, 156 .proc_name = DRV_NAME, 157 .dma_boundary = ATA_DMA_BOUNDARY, 158 .slave_configure = ata_scsi_slave_config, 159 .slave_destroy = ata_scsi_slave_destroy, 160 .bios_param = ata_std_bios_param, 161 }; 162 163 static struct ata_port_operations ns87410_port_ops = { 164 .port_disable = ata_port_disable, 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 .irq_ack = ata_irq_ack, 188 189 .port_start = ata_port_start, 190 }; 191 192 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) 193 { 194 static const struct ata_port_info info = { 195 .sht = &ns87410_sht, 196 .flags = ATA_FLAG_SLAVE_POSS, 197 .pio_mask = 0x0F, 198 .port_ops = &ns87410_port_ops 199 }; 200 const struct ata_port_info *ppi[] = { &info, NULL }; 201 return ata_pci_init_one(dev, ppi); 202 } 203 204 static const struct pci_device_id ns87410[] = { 205 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), }, 206 207 { }, 208 }; 209 210 static struct pci_driver ns87410_pci_driver = { 211 .name = DRV_NAME, 212 .id_table = ns87410, 213 .probe = ns87410_init_one, 214 .remove = ata_pci_remove_one, 215 #ifdef CONFIG_PM 216 .suspend = ata_pci_device_suspend, 217 .resume = ata_pci_device_resume, 218 #endif 219 }; 220 221 static int __init ns87410_init(void) 222 { 223 return pci_register_driver(&ns87410_pci_driver); 224 } 225 226 static void __exit ns87410_exit(void) 227 { 228 pci_unregister_driver(&ns87410_pci_driver); 229 } 230 231 MODULE_AUTHOR("Alan Cox"); 232 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410"); 233 MODULE_LICENSE("GPL"); 234 MODULE_DEVICE_TABLE(pci, ns87410); 235 MODULE_VERSION(DRV_VERSION); 236 237 module_init(ns87410_init); 238 module_exit(ns87410_exit); 239