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9b13b682 AC |
1 | /* |
2 | * pata_it8213.c - iTE Tech. Inc. IT8213 PATA driver | |
3 | * | |
4 | * The IT8213 is a very Intel ICH like device for timing purposes, having | |
5 | * a similar register layout and the same split clock arrangement. Cable | |
6 | * detection is different, and it does not have slave channels or all the | |
7 | * clutter of later ICH/SATA setups. | |
8 | */ | |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/blkdev.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/device.h> | |
17 | #include <scsi/scsi_host.h> | |
18 | #include <linux/libata.h> | |
19 | #include <linux/ata.h> | |
20 | ||
21 | #define DRV_NAME "pata_it8213" | |
8bc3fc47 | 22 | #define DRV_VERSION "0.0.3" |
9b13b682 AC |
23 | |
24 | /** | |
13a28c15 | 25 | * it8213_pre_reset - probe begin |
cc0680a5 | 26 | * @link: link |
d4b2bab4 | 27 | * @deadline: deadline jiffies for the operation |
9b13b682 | 28 | * |
5816fbbf AC |
29 | * Filter out ports by the enable bits before doing the normal reset |
30 | * and probe. | |
9b13b682 AC |
31 | */ |
32 | ||
cc0680a5 | 33 | static int it8213_pre_reset(struct ata_link *link, unsigned long deadline) |
9b13b682 AC |
34 | { |
35 | static const struct pci_bits it8213_enable_bits[] = { | |
36 | { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ | |
37 | }; | |
cc0680a5 | 38 | struct ata_port *ap = link->ap; |
9b13b682 | 39 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
9b13b682 AC |
40 | if (!pci_test_config_bits(pdev, &it8213_enable_bits[ap->port_no])) |
41 | return -ENOENT; | |
d4b2bab4 | 42 | |
9363c382 | 43 | return ata_sff_prereset(link, deadline); |
9b13b682 AC |
44 | } |
45 | ||
5816fbbf AC |
46 | /** |
47 | * it8213_cable_detect - check for 40/80 pin | |
48 | * @ap: Port | |
49 | * | |
50 | * Perform cable detection for the 8213 ATA interface. This is | |
51 | * different to the PIIX arrangement | |
52 | */ | |
53 | ||
54 | static int it8213_cable_detect(struct ata_port *ap) | |
55 | { | |
56 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
57 | u8 tmp; | |
58 | pci_read_config_byte(pdev, 0x42, &tmp); | |
59 | if (tmp & 2) /* The initial docs are incorrect */ | |
60 | return ATA_CBL_PATA40; | |
61 | return ATA_CBL_PATA80; | |
62 | } | |
63 | ||
9b13b682 AC |
64 | /** |
65 | * it8213_set_piomode - Initialize host controller PATA PIO timings | |
66 | * @ap: Port whose timings we are configuring | |
5816fbbf | 67 | * @adev: Device whose timings we are configuring |
9b13b682 AC |
68 | * |
69 | * Set PIO mode for device, in host controller PCI config space. | |
70 | * | |
71 | * LOCKING: | |
72 | * None (inherited from caller). | |
73 | */ | |
74 | ||
75 | static void it8213_set_piomode (struct ata_port *ap, struct ata_device *adev) | |
76 | { | |
77 | unsigned int pio = adev->pio_mode - XFER_PIO_0; | |
78 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
4780c0b2 BZ |
79 | unsigned int master_port = ap->port_no ? 0x42 : 0x40; |
80 | u16 master_data; | |
9b13b682 AC |
81 | int control = 0; |
82 | ||
83 | /* | |
84 | * See Intel Document 298600-004 for the timing programing rules | |
85 | * for PIIX/ICH. The 8213 is a clone so very similar | |
86 | */ | |
87 | ||
88 | static const /* ISP RTC */ | |
89 | u8 timings[][2] = { { 0, 0 }, | |
90 | { 0, 0 }, | |
91 | { 1, 0 }, | |
92 | { 2, 1 }, | |
93 | { 2, 3 }, }; | |
94 | ||
ed869ff0 BZ |
95 | if (pio > 1) |
96 | control |= 1; /* TIME */ | |
9b13b682 | 97 | if (ata_pio_need_iordy(adev)) /* PIO 3/4 require IORDY */ |
ed869ff0 | 98 | control |= 2; /* IE */ |
9b13b682 AC |
99 | /* Bit 2 is set for ATAPI on the IT8213 - reverse of ICH/PIIX */ |
100 | if (adev->class != ATA_DEV_ATA) | |
ed869ff0 | 101 | control |= 4; /* PPE */ |
9b13b682 | 102 | |
4780c0b2 | 103 | pci_read_config_word(dev, master_port, &master_data); |
9b13b682 | 104 | |
ed869ff0 | 105 | /* Set PPE, IE, and TIME as appropriate */ |
9b13b682 | 106 | if (adev->devno == 0) { |
4780c0b2 BZ |
107 | master_data &= 0xCCF0; |
108 | master_data |= control; | |
109 | master_data |= (timings[pio][0] << 12) | | |
9b13b682 AC |
110 | (timings[pio][1] << 8); |
111 | } else { | |
112 | u8 slave_data; | |
113 | ||
4780c0b2 BZ |
114 | master_data &= 0xFF0F; |
115 | master_data |= (control << 4); | |
9b13b682 | 116 | |
1967b7ff | 117 | /* Slave timing in separate register */ |
9b13b682 AC |
118 | pci_read_config_byte(dev, 0x44, &slave_data); |
119 | slave_data &= 0xF0; | |
088ccb53 | 120 | slave_data |= (timings[pio][0] << 2) | timings[pio][1]; |
9b13b682 AC |
121 | pci_write_config_byte(dev, 0x44, slave_data); |
122 | } | |
123 | ||
4780c0b2 BZ |
124 | master_data |= 0x4000; /* Ensure SITRE is set */ |
125 | pci_write_config_word(dev, master_port, master_data); | |
9b13b682 AC |
126 | } |
127 | ||
128 | /** | |
129 | * it8213_set_dmamode - Initialize host controller PATA DMA timings | |
130 | * @ap: Port whose timings we are configuring | |
131 | * @adev: Device to program | |
132 | * | |
133 | * Set UDMA/MWDMA mode for device, in host controller PCI config space. | |
134 | * This device is basically an ICH alike. | |
135 | * | |
136 | * LOCKING: | |
137 | * None (inherited from caller). | |
138 | */ | |
139 | ||
140 | static void it8213_set_dmamode (struct ata_port *ap, struct ata_device *adev) | |
141 | { | |
142 | struct pci_dev *dev = to_pci_dev(ap->host->dev); | |
143 | u16 master_data; | |
144 | u8 speed = adev->dma_mode; | |
145 | int devid = adev->devno; | |
146 | u8 udma_enable; | |
147 | ||
148 | static const /* ISP RTC */ | |
149 | u8 timings[][2] = { { 0, 0 }, | |
150 | { 0, 0 }, | |
151 | { 1, 0 }, | |
152 | { 2, 1 }, | |
153 | { 2, 3 }, }; | |
154 | ||
155 | pci_read_config_word(dev, 0x40, &master_data); | |
156 | pci_read_config_byte(dev, 0x48, &udma_enable); | |
157 | ||
158 | if (speed >= XFER_UDMA_0) { | |
159 | unsigned int udma = adev->dma_mode - XFER_UDMA_0; | |
160 | u16 udma_timing; | |
161 | u16 ideconf; | |
162 | int u_clock, u_speed; | |
163 | ||
164 | /* Clocks follow the PIIX style */ | |
165 | u_speed = min(2 - (udma & 1), udma); | |
11e872a3 | 166 | if (udma > 4) |
9b13b682 AC |
167 | u_clock = 0x1000; /* 100Mhz */ |
168 | else if (udma > 2) | |
169 | u_clock = 1; /* 66Mhz */ | |
170 | else | |
171 | u_clock = 0; /* 33Mhz */ | |
172 | ||
173 | udma_enable |= (1 << devid); | |
174 | ||
e0ee792b | 175 | /* Load the UDMA cycle time */ |
9b13b682 AC |
176 | pci_read_config_word(dev, 0x4A, &udma_timing); |
177 | udma_timing &= ~(3 << (4 * devid)); | |
e0ee792b | 178 | udma_timing |= u_speed << (4 * devid); |
9b13b682 AC |
179 | pci_write_config_word(dev, 0x4A, udma_timing); |
180 | ||
181 | /* Load the clock selection */ | |
182 | pci_read_config_word(dev, 0x54, &ideconf); | |
183 | ideconf &= ~(0x1001 << devid); | |
184 | ideconf |= u_clock << devid; | |
185 | pci_write_config_word(dev, 0x54, ideconf); | |
186 | } else { | |
187 | /* | |
188 | * MWDMA is driven by the PIO timings. We must also enable | |
189 | * IORDY unconditionally along with TIME1. PPE has already | |
190 | * been set when the PIO timing was set. | |
191 | */ | |
192 | unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0; | |
193 | unsigned int control; | |
194 | u8 slave_data; | |
195 | static const unsigned int needed_pio[3] = { | |
196 | XFER_PIO_0, XFER_PIO_3, XFER_PIO_4 | |
197 | }; | |
198 | int pio = needed_pio[mwdma] - XFER_PIO_0; | |
199 | ||
200 | control = 3; /* IORDY|TIME1 */ | |
201 | ||
202 | /* If the drive MWDMA is faster than it can do PIO then | |
203 | we must force PIO into PIO0 */ | |
204 | ||
205 | if (adev->pio_mode < needed_pio[mwdma]) | |
206 | /* Enable DMA timing only */ | |
207 | control |= 8; /* PIO cycles in PIO0 */ | |
208 | ||
209 | if (devid) { /* Slave */ | |
210 | master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */ | |
211 | master_data |= control << 4; | |
212 | pci_read_config_byte(dev, 0x44, &slave_data); | |
e3f1d5cd | 213 | slave_data &= 0xF0; |
9b13b682 AC |
214 | /* Load the matching timing */ |
215 | slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0); | |
216 | pci_write_config_byte(dev, 0x44, slave_data); | |
217 | } else { /* Master */ | |
218 | master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY | |
219 | and master timing bits */ | |
220 | master_data |= control; | |
221 | master_data |= | |
222 | (timings[pio][0] << 12) | | |
223 | (timings[pio][1] << 8); | |
224 | } | |
225 | udma_enable &= ~(1 << devid); | |
226 | pci_write_config_word(dev, 0x40, master_data); | |
227 | } | |
228 | pci_write_config_byte(dev, 0x48, udma_enable); | |
229 | } | |
230 | ||
231 | static struct scsi_host_template it8213_sht = { | |
68d1d07b | 232 | ATA_BMDMA_SHT(DRV_NAME), |
9b13b682 AC |
233 | }; |
234 | ||
029cfd6b TH |
235 | |
236 | static struct ata_port_operations it8213_ops = { | |
237 | .inherits = &ata_bmdma_port_ops, | |
238 | .cable_detect = it8213_cable_detect, | |
9b13b682 AC |
239 | .set_piomode = it8213_set_piomode, |
240 | .set_dmamode = it8213_set_dmamode, | |
a1efdaba | 241 | .prereset = it8213_pre_reset, |
9b13b682 AC |
242 | }; |
243 | ||
244 | ||
245 | /** | |
246 | * it8213_init_one - Register 8213 ATA PCI device with kernel services | |
247 | * @pdev: PCI device to register | |
248 | * @ent: Entry in it8213_pci_tbl matching with @pdev | |
249 | * | |
250 | * Called from kernel PCI layer. | |
251 | * | |
252 | * LOCKING: | |
253 | * Inherited from PCI layer (may sleep). | |
254 | * | |
255 | * RETURNS: | |
256 | * Zero on success, or -ERRNO value. | |
257 | */ | |
258 | ||
259 | static int it8213_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
260 | { | |
1626aeb8 | 261 | static const struct ata_port_info info = { |
1d2808fd | 262 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 | 263 | .pio_mask = ATA_PIO4, |
fd87e792 | 264 | .mwdma_mask = ATA_MWDMA12_ONLY, |
11e872a3 | 265 | .udma_mask = ATA_UDMA6, |
9b13b682 AC |
266 | .port_ops = &it8213_ops, |
267 | }; | |
1626aeb8 TH |
268 | /* Current IT8213 stuff is single port */ |
269 | const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info }; | |
9b13b682 | 270 | |
06296a1e | 271 | ata_print_version_once(&pdev->dev, DRV_VERSION); |
9b13b682 | 272 | |
1c5afdf7 | 273 | return ata_pci_bmdma_init_one(pdev, ppi, &it8213_sht, NULL, 0); |
9b13b682 AC |
274 | } |
275 | ||
276 | static const struct pci_device_id it8213_pci_tbl[] = { | |
277 | { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), }, | |
278 | ||
279 | { } /* terminate list */ | |
280 | }; | |
281 | ||
282 | static struct pci_driver it8213_pci_driver = { | |
283 | .name = DRV_NAME, | |
284 | .id_table = it8213_pci_tbl, | |
285 | .probe = it8213_init_one, | |
286 | .remove = ata_pci_remove_one, | |
438ac6d5 | 287 | #ifdef CONFIG_PM |
9b13b682 AC |
288 | .suspend = ata_pci_device_suspend, |
289 | .resume = ata_pci_device_resume, | |
438ac6d5 | 290 | #endif |
9b13b682 AC |
291 | }; |
292 | ||
293 | static int __init it8213_init(void) | |
294 | { | |
295 | return pci_register_driver(&it8213_pci_driver); | |
296 | } | |
297 | ||
298 | static void __exit it8213_exit(void) | |
299 | { | |
300 | pci_unregister_driver(&it8213_pci_driver); | |
301 | } | |
302 | ||
303 | module_init(it8213_init); | |
304 | module_exit(it8213_exit); | |
305 | ||
306 | MODULE_AUTHOR("Alan Cox"); | |
307 | MODULE_DESCRIPTION("SCSI low-level driver for the ITE 8213"); | |
308 | MODULE_LICENSE("GPL"); | |
309 | MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); | |
310 | MODULE_VERSION(DRV_VERSION); |