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 * 37 * Check enabled ports 38 */ 39 40 static int ns87410_pre_reset(struct ata_port *ap) 41 { 42 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 43 static const struct pci_bits ns87410_enable_bits[] = { 44 { 0x43, 1, 0x08, 0x08 }, 45 { 0x47, 1, 0x08, 0x08 } 46 }; 47 48 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no])) 49 return -ENOENT; 50 return ata_std_prereset(ap); 51 } 52 53 /** 54 * ns87410_error_handler - probe reset 55 * @ap: ATA port 56 * 57 * Perform the ATA probe and bus reset sequence plus specific handling 58 * for this hardware. The MPIIX has the enable bits in a different place 59 * to PIIX4 and friends. As a pure PIO device it has no cable detect 60 */ 61 62 static void ns87410_error_handler(struct ata_port *ap) 63 { 64 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset); 65 } 66 67 /** 68 * ns87410_set_piomode - set initial PIO mode data 69 * @ap: ATA interface 70 * @adev: ATA device 71 * 72 * Program timing data. This is kept per channel not per device, 73 * and only affects the data port. 74 */ 75 76 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev) 77 { 78 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 79 int port = 0x40 + 4 * ap->port_no; 80 u8 idetcr, idefr; 81 struct ata_timing at; 82 83 static const u8 activebits[15] = { 84 0, 1, 2, 3, 4, 85 5, 5, 6, 6, 6, 86 6, 7, 7, 7, 7 87 }; 88 89 static const u8 recoverbits[12] = { 90 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7 91 }; 92 93 pci_read_config_byte(pdev, port + 3, &idefr); 94 95 if (ata_pio_need_iordy(adev)) 96 idefr |= 0x04; /* IORDY enable */ 97 else 98 idefr &= ~0x04; 99 100 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) { 101 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode); 102 return; 103 } 104 105 at.active = FIT(at.active, 2, 16) - 2; 106 at.setup = FIT(at.setup, 1, 4) - 1; 107 at.recover = FIT(at.recover, 1, 12) - 1; 108 109 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active]; 110 111 pci_write_config_byte(pdev, port, idetcr); 112 pci_write_config_byte(pdev, port + 3, idefr); 113 /* We use ap->private_data as a pointer to the device currently 114 loaded for timing */ 115 ap->private_data = adev; 116 } 117 118 /** 119 * ns87410_qc_issue_prot - command issue 120 * @qc: command pending 121 * 122 * Called when the libata layer is about to issue a command. We wrap 123 * this interface so that we can load the correct ATA timings if 124 * neccessary. 125 */ 126 127 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc) 128 { 129 struct ata_port *ap = qc->ap; 130 struct ata_device *adev = qc->dev; 131 132 /* If modes have been configured and the channel data is not loaded 133 then load it. We have to check if pio_mode is set as the core code 134 does not set adev->pio_mode to XFER_PIO_0 while probing as would be 135 logical */ 136 137 if (adev->pio_mode && adev != ap->private_data) 138 ns87410_set_piomode(ap, adev); 139 140 return ata_qc_issue_prot(qc); 141 } 142 143 static struct scsi_host_template ns87410_sht = { 144 .module = THIS_MODULE, 145 .name = DRV_NAME, 146 .ioctl = ata_scsi_ioctl, 147 .queuecommand = ata_scsi_queuecmd, 148 .can_queue = ATA_DEF_QUEUE, 149 .this_id = ATA_SHT_THIS_ID, 150 .sg_tablesize = LIBATA_MAX_PRD, 151 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 152 .emulated = ATA_SHT_EMULATED, 153 .use_clustering = ATA_SHT_USE_CLUSTERING, 154 .proc_name = DRV_NAME, 155 .dma_boundary = ATA_DMA_BOUNDARY, 156 .slave_configure = ata_scsi_slave_config, 157 .slave_destroy = ata_scsi_slave_destroy, 158 .bios_param = ata_std_bios_param, 159 #ifdef CONFIG_PM 160 .resume = ata_scsi_device_resume, 161 .suspend = ata_scsi_device_suspend, 162 #endif 163 }; 164 165 static struct ata_port_operations ns87410_port_ops = { 166 .port_disable = ata_port_disable, 167 .set_piomode = ns87410_set_piomode, 168 169 .tf_load = ata_tf_load, 170 .tf_read = ata_tf_read, 171 .check_status = ata_check_status, 172 .exec_command = ata_exec_command, 173 .dev_select = ata_std_dev_select, 174 175 .freeze = ata_bmdma_freeze, 176 .thaw = ata_bmdma_thaw, 177 .error_handler = ns87410_error_handler, 178 .post_internal_cmd = ata_bmdma_post_internal_cmd, 179 .cable_detect = ata_cable_40wire, 180 181 .qc_prep = ata_qc_prep, 182 .qc_issue = ns87410_qc_issue_prot, 183 184 .data_xfer = ata_data_xfer, 185 186 .irq_handler = ata_interrupt, 187 .irq_clear = ata_bmdma_irq_clear, 188 .irq_on = ata_irq_on, 189 .irq_ack = ata_irq_ack, 190 191 .port_start = ata_port_start, 192 }; 193 194 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) 195 { 196 static struct ata_port_info info = { 197 .sht = &ns87410_sht, 198 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 199 .pio_mask = 0x0F, 200 .port_ops = &ns87410_port_ops 201 }; 202 static struct ata_port_info *port_info[2] = {&info, &info}; 203 return ata_pci_init_one(dev, port_info, 2); 204 } 205 206 static const struct pci_device_id ns87410[] = { 207 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), }, 208 209 { }, 210 }; 211 212 static struct pci_driver ns87410_pci_driver = { 213 .name = DRV_NAME, 214 .id_table = ns87410, 215 .probe = ns87410_init_one, 216 .remove = ata_pci_remove_one, 217 #ifdef CONFIG_PM 218 .suspend = ata_pci_device_suspend, 219 .resume = ata_pci_device_resume, 220 #endif 221 }; 222 223 static int __init ns87410_init(void) 224 { 225 return pci_register_driver(&ns87410_pci_driver); 226 } 227 228 static void __exit ns87410_exit(void) 229 { 230 pci_unregister_driver(&ns87410_pci_driver); 231 } 232 233 MODULE_AUTHOR("Alan Cox"); 234 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410"); 235 MODULE_LICENSE("GPL"); 236 MODULE_DEVICE_TABLE(pci, ns87410); 237 MODULE_VERSION(DRV_VERSION); 238 239 module_init(ns87410_init); 240 module_exit(ns87410_exit); 241