3 * Copyright (C) 2006 Red Hat <alan@redhat.com>
5 * May be copied or modified under the terms of the GNU General Public License
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/pci.h>
11 #include <linux/delay.h>
12 #include <linux/hdreg.h>
13 #include <linux/ide.h>
14 #include <linux/init.h>
25 * jmicron_ratemask - Compute available modes
28 * Compute the available speeds for the devices on the interface. This
29 * is all modes to ATA133 clipped by drive cable setup.
32 static u8 jmicron_ratemask(ide_drive_t *drive)
35 if (!eighty_ninty_three(drive))
36 mode = min(mode, (u8)1);
41 * ata66_jmicron - Cable check
44 * Return 1 if the cable is 80pin
47 static int __devinit ata66_jmicron(ide_hwif_t *hwif)
49 struct pci_dev *pdev = hwif->pci_dev;
54 int port = hwif->channel;
55 port_type port_map[2];
57 pci_read_config_dword(pdev, 0x40, &control);
59 /* There are two basic mappings. One has the two SATA ports merged
60 as master/slave and the secondary as PATA, the other has only the
62 if (control & (1 << 23)) {
63 port_map[0] = PORT_SATA;
64 port_map[1] = PORT_PATA0;
66 port_map[0] = PORT_SATA;
67 port_map[1] = PORT_SATA;
70 /* The 365/366 may have this bit set to map the second PATA port
71 as the internal primary channel */
72 pci_read_config_dword(pdev, 0x80, &control5);
73 if (control5 & (1<<24))
74 port_map[0] = PORT_PATA1;
76 /* The two ports may then be logically swapped by the firmware */
77 if (control & (1 << 22))
81 * Now we know which physical port we are talking about we can
82 * actually do our cable checking etc. Thankfully we don't need
83 * to do the plumbing for other cases.
85 switch (port_map[port])
88 if (control & (1 << 3)) /* 40/80 pin primary */
92 if (control5 & (1 << 19)) /* 40/80 pin secondary */
100 static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)
106 * config_jmicron_chipset_for_pio - set drive timings
107 * @drive: drive to tune
112 static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)
114 u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
116 (void) ide_config_drive_speed(drive, speed);
120 * jmicron_tune_chipset - set controller timings
121 * @drive: Drive to set up
122 * @xferspeed: speed we want to achieve
124 * As the JMicron snoops for timings all we actually need to do is
125 * make sure we don't set an invalid mode. We do need to honour
126 * the cable detect here.
129 static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
132 u8 speed = ide_rate_filter(jmicron_ratemask(drive), xferspeed);
134 return ide_config_drive_speed(drive, speed);
138 * config_chipset_for_dma - configure for DMA
139 * @drive: drive to configure
141 * As the JMicron snoops for timings all we actually need to do is
142 * make sure we don't set an invalid mode.
145 static int config_chipset_for_dma (ide_drive_t *drive)
147 u8 speed = ide_dma_speed(drive, jmicron_ratemask(drive));
149 config_jmicron_chipset_for_pio(drive, !speed);
150 jmicron_tune_chipset(drive, speed);
151 return ide_dma_enable(drive);
155 * jmicron_configure_drive_for_dma - set up for DMA transfers
156 * @drive: drive we are going to set up
158 * As the JMicron snoops for timings all we actually need to do is
159 * make sure we don't set an invalid mode.
162 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
164 ide_hwif_t *hwif = drive->hwif;
166 if (ide_use_dma(drive)) {
167 if (config_chipset_for_dma(drive))
168 return hwif->ide_dma_on(drive);
170 config_jmicron_chipset_for_pio(drive, 1);
171 return hwif->ide_dma_off_quietly(drive);
175 * init_hwif_jmicron - set up hwif structs
176 * @hwif: interface to set up
178 * Minimal set up is required for the Jmicron hardware.
181 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
183 hwif->speedproc = &jmicron_tune_chipset;
184 hwif->tuneproc = &jmicron_tuneproc;
186 hwif->drives[0].autotune = 1;
187 hwif->drives[1].autotune = 1;
193 hwif->ultra_mask = 0x7f;
194 hwif->mwdma_mask = 0x07;
196 hwif->ide_dma_check = &jmicron_config_drive_for_dma;
197 if (!(hwif->udma_four))
198 hwif->udma_four = ata66_jmicron(hwif);
201 hwif->drives[0].autodma = hwif->autodma;
202 hwif->drives[1].autodma = hwif->autodma;
209 #define DECLARE_JMB_DEV(name_str) \
212 .init_hwif = init_hwif_jmicron, \
214 .autodma = AUTODMA, \
215 .bootable = ON_BOARD, \
216 .enablebits = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \
219 static ide_pci_device_t jmicron_chipsets[] __devinitdata = {
220 /* 0 */ DECLARE_JMB_DEV("JMB361"),
221 /* 1 */ DECLARE_JMB_DEV("JMB363"),
222 /* 2 */ DECLARE_JMB_DEV("JMB365"),
223 /* 3 */ DECLARE_JMB_DEV("JMB366"),
224 /* 4 */ DECLARE_JMB_DEV("JMB368"),
228 * jmicron_init_one - pci layer discovery entry
230 * @id: ident table entry
232 * Called by the PCI code when it finds a Jmicron controller.
233 * We then use the IDE PCI generic helper to do most of the work.
236 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
238 ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]);
242 static struct pci_device_id jmicron_pci_tbl[] = {
243 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361), 0},
244 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363), 1},
245 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365), 2},
246 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366), 3},
247 { PCI_DEVICE(PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368), 4},
251 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
253 static struct pci_driver driver = {
254 .name = "JMicron IDE",
255 .id_table = jmicron_pci_tbl,
256 .probe = jmicron_init_one,
259 static int __init jmicron_ide_init(void)
261 return ide_pci_register_driver(&driver);
264 module_init(jmicron_ide_init);
266 MODULE_AUTHOR("Alan Cox");
267 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
268 MODULE_LICENSE("GPL");