1 /* 2 * Marvell PATA driver. 3 * 4 * For the moment we drive the PATA port in legacy mode. That 5 * isn't making full use of the device functionality but it is 6 * easy to get working. 7 * 8 * (c) 2006 Red Hat <alan@redhat.com> 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/pci.h> 14 #include <linux/init.h> 15 #include <linux/blkdev.h> 16 #include <linux/delay.h> 17 #include <linux/device.h> 18 #include <scsi/scsi_host.h> 19 #include <linux/libata.h> 20 #include <linux/ata.h> 21 22 #define DRV_NAME "pata_marvell" 23 #define DRV_VERSION "0.1.1" 24 25 /** 26 * marvell_pre_reset - check for 40/80 pin 27 * @ap: Port 28 * 29 * Perform the PATA port setup we need. 30 */ 31 32 static int marvell_pre_reset(struct ata_port *ap) 33 { 34 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 35 u32 devices; 36 void __iomem *barp; 37 int i; 38 39 /* Check if our port is enabled */ 40 41 barp = pci_iomap(pdev, 5, 0x10); 42 if (barp == NULL) 43 return -ENOMEM; 44 printk("BAR5:"); 45 for(i = 0; i <= 0x0F; i++) 46 printk("%02X:%02X ", i, readb(barp + i)); 47 printk("\n"); 48 49 devices = readl(barp + 0x0C); 50 pci_iounmap(pdev, barp); 51 52 if ((pdev->device == 0x6145) && (ap->port_no == 0) && 53 (!(devices & 0x10))) /* PATA enable ? */ 54 return -ENOENT; 55 56 /* Cable type */ 57 switch(ap->port_no) 58 { 59 case 0: 60 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) 61 ap->cbl = ATA_CBL_PATA40; 62 else 63 ap->cbl = ATA_CBL_PATA80; 64 break; 65 66 case 1: /* Legacy SATA port */ 67 ap->cbl = ATA_CBL_SATA; 68 break; 69 } 70 return ata_std_prereset(ap); 71 } 72 73 /** 74 * marvell_error_handler - Setup and error handler 75 * @ap: Port to handle 76 * 77 * LOCKING: 78 * None (inherited from caller). 79 */ 80 81 static void marvell_error_handler(struct ata_port *ap) 82 { 83 return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset, 84 NULL, ata_std_postreset); 85 } 86 87 /* No PIO or DMA methods needed for this device */ 88 89 static struct scsi_host_template marvell_sht = { 90 .module = THIS_MODULE, 91 .name = DRV_NAME, 92 .ioctl = ata_scsi_ioctl, 93 .queuecommand = ata_scsi_queuecmd, 94 .can_queue = ATA_DEF_QUEUE, 95 .this_id = ATA_SHT_THIS_ID, 96 .sg_tablesize = LIBATA_MAX_PRD, 97 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 98 .emulated = ATA_SHT_EMULATED, 99 .use_clustering = ATA_SHT_USE_CLUSTERING, 100 .proc_name = DRV_NAME, 101 .dma_boundary = ATA_DMA_BOUNDARY, 102 .slave_configure = ata_scsi_slave_config, 103 .slave_destroy = ata_scsi_slave_destroy, 104 /* Use standard CHS mapping rules */ 105 .bios_param = ata_std_bios_param, 106 #ifdef CONFIG_PM 107 .resume = ata_scsi_device_resume, 108 .suspend = ata_scsi_device_suspend, 109 #endif 110 }; 111 112 static const struct ata_port_operations marvell_ops = { 113 .port_disable = ata_port_disable, 114 115 /* Task file is PCI ATA format, use helpers */ 116 .tf_load = ata_tf_load, 117 .tf_read = ata_tf_read, 118 .check_status = ata_check_status, 119 .exec_command = ata_exec_command, 120 .dev_select = ata_std_dev_select, 121 122 .freeze = ata_bmdma_freeze, 123 .thaw = ata_bmdma_thaw, 124 .error_handler = marvell_error_handler, 125 .post_internal_cmd = ata_bmdma_post_internal_cmd, 126 127 /* BMDMA handling is PCI ATA format, use helpers */ 128 .bmdma_setup = ata_bmdma_setup, 129 .bmdma_start = ata_bmdma_start, 130 .bmdma_stop = ata_bmdma_stop, 131 .bmdma_status = ata_bmdma_status, 132 .qc_prep = ata_qc_prep, 133 .qc_issue = ata_qc_issue_prot, 134 .data_xfer = ata_data_xfer, 135 136 /* Timeout handling */ 137 .irq_handler = ata_interrupt, 138 .irq_clear = ata_bmdma_irq_clear, 139 .irq_on = ata_irq_on, 140 .irq_ack = ata_irq_ack, 141 142 /* Generic PATA PCI ATA helpers */ 143 .port_start = ata_port_start, 144 }; 145 146 147 /** 148 * marvell_init_one - Register Marvell ATA PCI device with kernel services 149 * @pdev: PCI device to register 150 * @ent: Entry in marvell_pci_tbl matching with @pdev 151 * 152 * Called from kernel PCI layer. 153 * 154 * LOCKING: 155 * Inherited from PCI layer (may sleep). 156 * 157 * RETURNS: 158 * Zero on success, or -ERRNO value. 159 */ 160 161 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 162 { 163 static struct ata_port_info info = { 164 .sht = &marvell_sht, 165 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 166 167 .pio_mask = 0x1f, 168 .mwdma_mask = 0x07, 169 .udma_mask = 0x3f, 170 171 .port_ops = &marvell_ops, 172 }; 173 static struct ata_port_info info_sata = { 174 .sht = &marvell_sht, 175 /* Slave possible as its magically mapped not real */ 176 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, 177 178 .pio_mask = 0x1f, 179 .mwdma_mask = 0x07, 180 .udma_mask = 0x7f, 181 182 .port_ops = &marvell_ops, 183 }; 184 struct ata_port_info *port_info[2] = { &info, &info_sata }; 185 int n_port = 2; 186 187 if (pdev->device == 0x6101) 188 n_port = 1; 189 190 return ata_pci_init_one(pdev, port_info, n_port); 191 } 192 193 static const struct pci_device_id marvell_pci_tbl[] = { 194 { PCI_DEVICE(0x11AB, 0x6101), }, 195 { PCI_DEVICE(0x11AB, 0x6145), }, 196 { } /* terminate list */ 197 }; 198 199 static struct pci_driver marvell_pci_driver = { 200 .name = DRV_NAME, 201 .id_table = marvell_pci_tbl, 202 .probe = marvell_init_one, 203 .remove = ata_pci_remove_one, 204 #ifdef CONFIG_PM 205 .suspend = ata_pci_device_suspend, 206 .resume = ata_pci_device_resume, 207 #endif 208 }; 209 210 static int __init marvell_init(void) 211 { 212 return pci_register_driver(&marvell_pci_driver); 213 } 214 215 static void __exit marvell_exit(void) 216 { 217 pci_unregister_driver(&marvell_pci_driver); 218 } 219 220 module_init(marvell_init); 221 module_exit(marvell_exit); 222 223 MODULE_AUTHOR("Alan Cox"); 224 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); 225 MODULE_LICENSE("GPL"); 226 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); 227 MODULE_VERSION(DRV_VERSION); 228 229