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Linux/drivers/ide/jmicron.c

  1 
  2 /*
  3  * Copyright (C) 2006           Red Hat
  4  *
  5  *  May be copied or modified under the terms of the GNU General Public License
  6  */
  7 
  8 #include <linux/types.h>
  9 #include <linux/module.h>
 10 #include <linux/pci.h>
 11 #include <linux/ide.h>
 12 #include <linux/init.h>
 13 
 14 #define DRV_NAME "jmicron"
 15 
 16 typedef enum {
 17         PORT_PATA0 = 0,
 18         PORT_PATA1 = 1,
 19         PORT_SATA = 2,
 20 } port_type;
 21 
 22 /**
 23  *      jmicron_cable_detect    -       cable detection
 24  *      @hwif: IDE port
 25  *
 26  *      Returns the cable type.
 27  */
 28 
 29 static u8 jmicron_cable_detect(ide_hwif_t *hwif)
 30 {
 31         struct pci_dev *pdev = to_pci_dev(hwif->dev);
 32 
 33         u32 control;
 34         u32 control5;
 35 
 36         int port = hwif->channel;
 37         port_type port_map[2];
 38 
 39         pci_read_config_dword(pdev, 0x40, &control);
 40 
 41         /* There are two basic mappings. One has the two SATA ports merged
 42            as master/slave and the secondary as PATA, the other has only the
 43            SATA port mapped */
 44         if (control & (1 << 23)) {
 45                 port_map[0] = PORT_SATA;
 46                 port_map[1] = PORT_PATA0;
 47         } else {
 48                 port_map[0] = PORT_SATA;
 49                 port_map[1] = PORT_SATA;
 50         }
 51 
 52         /* The 365/366 may have this bit set to map the second PATA port
 53            as the internal primary channel */
 54         pci_read_config_dword(pdev, 0x80, &control5);
 55         if (control5 & (1<<24))
 56                 port_map[0] = PORT_PATA1;
 57 
 58         /* The two ports may then be logically swapped by the firmware */
 59         if (control & (1 << 22))
 60                 port = port ^ 1;
 61 
 62         /*
 63          *      Now we know which physical port we are talking about we can
 64          *      actually do our cable checking etc. Thankfully we don't need
 65          *      to do the plumbing for other cases.
 66          */
 67         switch (port_map[port]) {
 68         case PORT_PATA0:
 69                 if (control & (1 << 3)) /* 40/80 pin primary */
 70                         return ATA_CBL_PATA40;
 71                 return ATA_CBL_PATA80;
 72         case PORT_PATA1:
 73                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
 74                         return ATA_CBL_PATA40;
 75                 return ATA_CBL_PATA80;
 76         case PORT_SATA:
 77                 break;
 78         }
 79         /* Avoid bogus "control reaches end of non-void function" */
 80         return ATA_CBL_PATA80;
 81 }
 82 
 83 static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 84 {
 85 }
 86 
 87 /**
 88  *      jmicron_set_dma_mode    -       set host controller for DMA mode
 89  *      @hwif: port
 90  *      @drive: drive
 91  *
 92  *      As the JMicron snoops for timings we don't need to do anything here.
 93  */
 94 
 95 static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 96 {
 97 }
 98 
 99 static const struct ide_port_ops jmicron_port_ops = {
100         .set_pio_mode           = jmicron_set_pio_mode,
101         .set_dma_mode           = jmicron_set_dma_mode,
102         .cable_detect           = jmicron_cable_detect,
103 };
104 
105 static const struct ide_port_info jmicron_chipset = {
106         .name           = DRV_NAME,
107         .enablebits     = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
108         .port_ops       = &jmicron_port_ops,
109         .pio_mask       = ATA_PIO5,
110         .mwdma_mask     = ATA_MWDMA2,
111         .udma_mask      = ATA_UDMA6,
112 };
113 
114 /**
115  *      jmicron_init_one        -       pci layer discovery entry
116  *      @dev: PCI device
117  *      @id: ident table entry
118  *
119  *      Called by the PCI code when it finds a Jmicron controller.
120  *      We then use the IDE PCI generic helper to do most of the work.
121  */
122 
123 static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
124 {
125         return ide_pci_init_one(dev, &jmicron_chipset, NULL);
126 }
127 
128 /* All JMB PATA controllers have and will continue to have the same
129  * interface.  Matching vendor and device class is enough for all
130  * current and future controllers if the controller is programmed
131  * properly.
132  *
133  * If libata is configured, jmicron PCI quirk programs the controller
134  * into the correct mode.  If libata isn't configured, match known
135  * device IDs too to maintain backward compatibility.
136  */
137 static struct pci_device_id jmicron_pci_tbl[] = {
138 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
139         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
140         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
141         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
142         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
143         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
144 #endif
145         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
146           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
147         { 0, },
148 };
149 
150 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
151 
152 static struct pci_driver jmicron_pci_driver = {
153         .name           = "JMicron IDE",
154         .id_table       = jmicron_pci_tbl,
155         .probe          = jmicron_init_one,
156         .remove         = ide_pci_remove,
157         .suspend        = ide_pci_suspend,
158         .resume         = ide_pci_resume,
159 };
160 
161 static int __init jmicron_ide_init(void)
162 {
163         return ide_pci_register_driver(&jmicron_pci_driver);
164 }
165 
166 static void __exit jmicron_ide_exit(void)
167 {
168         pci_unregister_driver(&jmicron_pci_driver);
169 }
170 
171 module_init(jmicron_ide_init);
172 module_exit(jmicron_ide_exit);
173 
174 MODULE_AUTHOR("Alan Cox");
175 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
176 MODULE_LICENSE("GPL");
177 

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